WO2011016202A1 - 置換されたアントラセン環構造とピリドインドール環構造を有する化合物および有機エレクトロルミネッセンス素子 - Google Patents
置換されたアントラセン環構造とピリドインドール環構造を有する化合物および有機エレクトロルミネッセンス素子 Download PDFInfo
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- KXEKLMPAKKYQMS-UHFFFAOYSA-N CC1(C=CC(C2)C2C1C1=C2C=CCC1)[I]2c(cc1)ccc1-c(c1c2cccc1)c(cccc1)c1c2-c1c(cccc2)c2c(-c2ccccc2)c2ccccc12 Chemical compound CC1(C=CC(C2)C2C1C1=C2C=CCC1)[I]2c(cc1)ccc1-c(c1c2cccc1)c(cccc1)c1c2-c1c(cccc2)c2c(-c2ccccc2)c2ccccc12 KXEKLMPAKKYQMS-UHFFFAOYSA-N 0.000 description 1
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Definitions
- the present invention relates to a compound suitable for an organic electroluminescence element which is a self-luminous element suitable for various display devices, and the element, and more specifically, a compound having a substituted anthracene ring structure and a pyridoindole ring structure And an organic electroluminescence device using the compound.
- organic electroluminescence elements are self-luminous elements, they have been actively researched because they are brighter and more visible than liquid crystal elements, and can display clearly.
- Non-Patent Document 2 the use of triplet excitons has been attempted for the purpose of further improving the luminous efficiency, and the use of phosphorescent emitters has been studied (for example, see Non-Patent Document 2).
- the light emitting layer can also be prepared by doping a charge transporting compound generally called a host material with a phosphor or a phosphorescent light emitter.
- a charge transporting compound generally called a host material with a phosphor or a phosphorescent light emitter.
- the light injected from both electrodes is recombined in the light emitting layer to obtain light emission.
- the hole moving speed is faster than the electron moving speed, some of the holes are in the light emitting layer. There is a problem that the efficiency decreases due to passing through. Therefore, an electron transport material having a high electron moving speed is demanded.
- Tris (8-hydroxyquinoline) aluminum (hereinafter abbreviated as Alq 3 ), which is a typical light emitting material, is generally used as an electron transport material, but has a hole blocking performance because its work function is 5.8 eV. It can not be said.
- a method for preventing a part of holes from passing through the light emitting layer and improving the probability of charge recombination in the light emitting layer is to insert a hole blocking layer.
- a hole blocking material triazole derivatives (for example, refer to Patent Document 3), bathocuproine (hereinafter abbreviated as BCP), mixed ligand complexes of aluminum (BAlq) (for example, refer to Non-Patent Document 2). Etc. have been proposed.
- TAZ 3- (4-biphenylyl) -4-phenyl-5- (4-t-butylphenyl) -1,2,4-triazole
- TAZ has a large work function of 6.6 eV and high hole blocking ability
- an electron transporting hole blocking layer laminated on the cathode side of a fluorescent light emitting layer or phosphorescent light emitting layer produced by vacuum deposition or coating contributes to high efficiency of the organic electroluminescence element (see, for example, Non-Patent Document 3).
- BCP also has a high work function of 6.7 eV and a high hole blocking ability, but its glass transition point (Tg) is as low as 83 ° C., so that the stability of the thin film is poor and it functions sufficiently as a hole blocking layer. I can't say that.
- JP-A-8-48656 Japanese Patent No. 3194657 Japanese Patent No. 2734341
- the object of the present invention is as a material for an organic electroluminescence device with high efficiency and high durability, excellent electron injection / transport performance, hole blocking ability, and excellent stability in a thin film state. It is another object of the present invention to provide an organic electroluminescent device having high efficiency and high durability using the compound.
- the physical characteristics of the organic compound to be provided by the present invention are as follows: (1) good electron injection characteristics, (2) high electron transfer speed, and (3) hole blocking ability. It can be mentioned that it is excellent, (4) the thin film state is stable, and (5) it is excellent in heat resistance.
- the physical characteristics of the organic electroluminescent device to be provided by the present invention include (1) high luminous efficiency and power efficiency, (2) low emission start voltage, and (3) practical use. It can be mentioned that the drive voltage is low.
- the present inventors paid attention to the fact that the pyridoindole ring structure has a high electron transporting ability and excellent heat resistance, and thus substituted anthracene.
- the present invention is completed. It came.
- the present invention is a compound having a substituted anthracene ring structure and a pyridoindole ring structure represented by the following general formula (1), and having an organic layer having at least one organic layer sandwiched between a pair of electrodes.
- the compound is used as a constituent material of at least one organic layer.
- Ar represents a substituted or unsubstituted aromatic hydrocarbon group or a substituted or unsubstituted condensed polycyclic aromatic group
- A represents a substituted or unsubstituted aromatic hydrocarbon divalent group, substituted or unsubstituted.
- B represents a single bond or a divalent group of a substituted or unsubstituted aromatic hydrocarbon
- substituted or unsubstituted represents a divalent group of an unsubstituted aromatic heterocyclic ring or a substituted or unsubstituted condensed polycyclic aromatic divalent group
- R1 to R8 may be the same or different and each represents a hydrogen atom, a deuterium atom, a fluorine atom, Chlorine atom, cyano group, optionally substituted linear or branched alkyl group having 1 to 6 carbon atoms, substituted or unsubstituted aromatic hydrocarbon group, substituted or unsubstituted aromatic group Heterocyclic group or substituted or absent Represents a condensed polycyclic aromatic group, and W, X, Y, and
- Specific examples of the “polycyclic aromatic group” include a phenyl group, a biphenylyl group, a terphenylyl group, a naphthyl group, an anthryl group, a phenanthryl group, a fluorenyl group, an indenyl group, and a pyrenyl group.
- substituted aromatic hydrocarbon group or “substituted condensed polycyclic aromatic group” represented by Ar in the general formula (1), specifically, a deuterium atom, a fluorine atom, Chlorine atom, cyano group, hydroxyl group, nitro group, linear or branched alkyl group having 1 to 6 carbon atoms, cyclopentyl group, cyclohexyl group, linear or branched alkoxy group having 1 to 6 carbon atoms A dialkylamino group substituted with a linear or branched alkyl group having 1 to 6 carbon atoms, phenyl group, naphthyl group, anthryl group, fluorenyl group, styryl group, pyridyl group, pyridoindolyl group, quinolyl group And a group such as a benzothiazolyl group, and these substituents may be further substituted.
- substituted aromatic hydrocarbon group “substituted aromatic heterocyclic group” or “substituted condensed polycyclic aromatic group” represented by R1 to R8 in the general formula (1), Specifically, deuterium atom, fluorine atom, chlorine atom, trifluoromethyl group, linear or branched alkyl group having 1 to 6 carbon atoms, phenyl group, biphenylyl group, terphenylyl group, tetrakisphenyl group, styryl A group, a naphthyl group, a fluorenyl group, a phenanthryl group, an indenyl group, a pyrenyl group, and a pyridoindolyl group, and these substituents may be further substituted.
- C1-C6 in the “optionally substituted linear or branched alkyl group having 1 to 6 carbon atoms” represented by R1 to R8 in the general formula (1)
- Specific examples of the linear or branched alkyl group are methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, t-butyl, n Examples thereof include -pentyl group, i-pentyl group, t-pentyl group, n-hexyl group, i-hexyl group and t-hexyl group.
- substituents in the “straight-chain or branched alkyl group having 1 to 6 carbon atoms having a substituent” represented by R1 to R8 in the general formula (1) include deuterium Atom, fluorine atom, chlorine atom, phenyl group, biphenylyl group, terphenylyl group, tetrakisphenyl group, naphthyl group, fluorenyl group, phenanthryl group, indenyl group, pyrenyl group, pyridoindolyl group, and these substituents May be further substituted.
- a divalent group of a substituted or unsubstituted aromatic hydrocarbon “a divalent group of a substituted or unsubstituted aromatic heterocyclic ring” or “substituted or As the “divalent group of aromatic hydrocarbon”, “divalent group of aromatic heterocycle” or “divalent group of condensed polycyclic aromatic” in the “unsubstituted fused polycyclic aromatic divalent group”, Specifically, phenylene group, biphenylylene group, terphenylylene group, tetrakisphenylene group, naphthylene group, anthrylene group, phenanthrylene group, fluorenylene group, phenanthrolylene group, indenylene group, pyrenylene group, pyridinylene group, pyrimidinylene group, quinolylene group, Isoquinolylene group, indolylene group, carbazolylene group, quinoxarylene group
- a deuterium atom, a fluorine atom, a chlorine atom, a trifluoromethyl group, a linear or branched alkyl group having 1 to 6 carbon atoms, a phenyl group, a biphenylyl group examples thereof include a terphenylyl group, a tetrakisphenyl group, a styryl group, a naphthyl group, a fluorenyl group, a phenanthryl group, an indenyl group, a pyrenyl group, and a pyridoindolyl group, and these substituents may be further substituted.
- the compound having a substituted anthracene ring structure and pyridoindole ring structure represented by the general formula (1) of the present invention is a novel compound, and has a positive electron transfer rate faster than conventional electron transport materials. It has a hole blocking ability, is thermally stable under high temperature conditions, and is stable in a thin film state.
- the compound having a substituted anthracene ring structure and pyridoindole ring structure represented by the general formula (1) of the present invention is an electron injection layer of an organic electroluminescence element (hereinafter abbreviated as an organic EL element) and It can be used as a constituent material for the electron transport layer.
- an organic EL element organic electroluminescence element
- the electron transport efficiency from the electron transport layer to the light emitting layer is improved, the light emission efficiency is improved, and the driving voltage is lowered, It has the effect
- the compound having a substituted anthracene ring structure and pyridoindole ring structure represented by the general formula (1) of the present invention can also be used as a constituent material of a hole blocking layer of an organic EL device.
- a material with excellent hole-blocking ability and electron transportability compared to conventional materials and high stability in the thin film state the driving voltage is lowered and current resistance is maintained while having high luminous efficiency. Is improved and the maximum light emission luminance of the organic EL element is improved.
- the compound having a substituted anthracene ring structure and pyridoindole ring structure represented by the general formula (1) of the present invention can also be used as a constituent material of a light emitting layer of an organic EL device.
- a fluorescent light emitting material or a phosphorescent light emitting material called a dopant is supported, and the light emitting layer As a result, it is possible to realize an organic EL element with reduced driving voltage and improved luminous efficiency.
- the organic EL device of the present invention has faster electron movement than conventional electron transport materials, has excellent hole blocking ability, is thermally stable under high temperature conditions, and has a stable thin film state. Since a compound having a substituted anthracene ring structure and pyridoindole ring structure is used, high efficiency and high durability can be realized.
- the compound having a substituted anthracene ring structure and pyridoindole ring structure of the present invention is useful as a constituent material for an electron injection layer, an electron transport layer, a hole blocking layer or a light emitting layer of an organic EL device, and is used for blocking holes. Excellent ability, stable thin film state, and excellent heat resistance.
- the organic EL device of the present invention has high luminous efficiency and high power efficiency, which can reduce the practical driving voltage of the device. The emission start voltage can be lowered and the durability can be improved.
- FIG. 1 is a 1H-NMR chart of the compound of Example 1 of the present invention (Compound 9).
- FIG. 3 is a 1H-NMR chart of the compound of Example 2 of the present invention (Compound 10).
- FIG. 3 is a 1H-NMR chart of the compound of Example 3 of the present invention (Compound 42).
- FIG. 3 is a 1H-NMR chart of the compound of Example 4 of the present invention (Compound 45).
- FIG. 6 is a 1H-NMR chart of the compound of Example 5 of the present invention (Compound 52).
- FIG. 6 is a 1H-NMR chart of the compound of Example 6 of the present invention (Compound 55).
- FIG. 6 is a 1H-NMR chart of the compound of Example 7 of the present invention (Compound 59).
- FIG. 6 is a 1H-NMR chart of the compound of Example 8 of the present invention (Compound 61).
- FIG. 6 is a 1H-NMR chart of the compound of Example 9 of the present invention (Compound 87).
- 1 is a 1H-NMR chart of the compound of Example 10 of the present invention (Compound 89).
- FIG. FIG. 4 is a diagram showing EL element configurations of Examples 27 to 38.
- 5 is a diagram showing an EL element configuration of Comparative Example 1.
- the compound having a substituted anthracene ring structure and pyridoindole ring structure of the present invention is a novel compound, and these compounds can be synthesized, for example, as follows.
- a pyridoindole ring is synthesized by performing a cyclization reaction of the corresponding halogenoanilinopyridine with a palladium catalyst (see, for example, Non-Patent Document 5), and various aromatic hydrocarbon compounds and condensed polycyclic aromatic compounds.
- a compound having a corresponding pyridoindole ring structure can be synthesized by condensation with a halide of an aromatic heterocyclic compound.
- a compound having a corresponding pyridoindole ring structure and a boronic acid or boronic acid ester having an anthracene ring structure synthesized by a known method are subjected to a cross-coupling reaction such as Suzuki coupling (for example, , See Non-patent Document 7), a compound having a substituted anthracene ring structure and a pyridoindole ring structure can be synthesized.
- the melting point and glass transition point were measured using a powder and a high-sensitivity differential scanning calorimeter DSC3100S manufactured by Bruker AXS.
- the work function was measured using an atmospheric photoelectron spectrometer AC-3 manufactured by Riken Keiki Co., Ltd., by forming a 100 nm thin film on the ITO substrate.
- the work function is an index of hole blocking ability.
- the stability under high-temperature conditions is determined by using an analytical device such as high-performance liquid chromatography on the sample before and after the powder is sealed in a thermostat set at a predetermined temperature under vacuum conditions. Then, the purity was measured, and the change in purity between the samples before and after was evaluated.
- the stability under a high temperature condition is an index of durability when the organic EL element is manufactured or driven.
- an anode, a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer, and a cathode are sequentially formed on the substrate, and the anode and the hole transport layer Those having a hole injection layer between them and those having an electron injection layer between the electron transport layer and the cathode are mentioned.
- several organic layers can be omitted.
- a structure having an anode, a hole transport layer, a light-emitting layer, an electron transport layer, and a cathode sequentially on a substrate can be used. .
- anode of the organic EL element an electrode material having a large work function such as ITO or gold is used.
- hole injection layer in addition to copper phthalocyanine, materials such as starburst type triphenylamine derivatives, various triphenylamine tetramers, and coating type polymer materials can be used.
- N, N′-diphenyl-N, N′-di (m-tolyl) -benzidine (hereinafter abbreviated as TPD) or N, N′-diphenyl-N, N′-di ( ⁇ -Naphthyl) -benzidine (hereinafter abbreviated as NPD)
- TPD T-tolyl
- NPD N, N′-diphenyl-N, N′-di ( ⁇ -Naphthyl) -benzidine
- benzidine derivatives such as N, N, N ′, N′-tetrabiphenylylbenzidine, various triphenylamine tetramers, and the like can be used.
- a coating type such as poly (3,4-ethylenedioxythiophene) (hereinafter abbreviated as PEDOT) / poly (styrene sulfonate) (hereinafter abbreviated as PSS) is used. These polymer materials can be used.
- PEDOT poly (3,4-ethylenedioxythiophene)
- PSS poly (styrene sulfonate)
- an aluminum complex, thiazole derivative, oxazole A compound having a hole blocking action such as a derivative, a carbazole derivative, a polydialkylfluorene derivative, a phenanthroline derivative such as BCP, or a triazole derivative such as TAZ can be used.
- a high-performance organic EL element can be produced.
- a host material for the light emitting layer for example, a phosphor such as quinacridone, coumarin, or rubrene can be used.
- Examples of phosphorescent emitters include green phosphorescent emitters such as iridium complex Ir (ppy) 3 of phenylpyridine, blue phosphorescent emitters such as FIrpic and FIr6, and red phosphorescent emitters such as Btp 2 Ir (acac).
- green phosphorescent emitters such as iridium complex Ir (ppy) 3 of phenylpyridine
- blue phosphorescent emitters such as FIrpic and FIr6
- red phosphorescent emitters such as Btp 2 Ir (acac).
- CBP 4,4′-di (N-carbazolyl) biphenyl
- 4,4 ′, 4 ′′ ⁇ as a hole injection / transport host material is used.
- Carbazole derivatives such as tri (N-carbazolyl) triphenylamine (hereinafter abbreviated as TCTA), 1,3-bis (carbazol-9-yl) benzene (hereinafter abbreviated as mCP), and the like can be used.
- TCTA tri (N-carbazolyl) triphenylamine
- mCP 1,3-bis (carbazol-9-yl) benzene
- mCP 1,3-bis (carbazol-9-yl) benzene
- TPB 1,3-bis (carbazol-9-yl) benzene
- the compound having a substituted anthracene ring structure and pyridoindole ring structure of the present invention can be used as an electron transport layer by laminating or co-depositing a conventional electron transport material.
- the organic EL element of the present invention may have an electron injection layer.
- the electron injection layer lithium fluoride or the like can be used.
- an electrode material having a low work function such as aluminum or an alloy having a lower work function such as aluminum magnesium is used as the electrode material.
- the structure of the obtained yellowish white powder was identified using NMR.
- the structure of the obtained yellow powder was identified using NMR.
- the structure of the obtained yellowish white powder was identified using NMR.
- the structure of the obtained yellow powder was identified using NMR.
- the structure of the obtained yellow powder was identified using NMR.
- the structure of the obtained yellow powder was identified using NMR.
- the mixture was refluxed for 21 hours with stirring.
- the mixture was cooled to room temperature, 100 ml of toluene and 100 ml of water were added and stirred, and the organic layer was separated.
- the organic layer was dehydrated with anhydrous magnesium sulfate and then concentrated under reduced pressure to obtain a crude product.
- the structure of the obtained yellow powder was identified using NMR.
- the structure of the obtained yellow powder was identified using NMR.
- the structure of the obtained yellow powder was identified using NMR.
- the structure of the obtained yellow powder was identified using NMR.
- the structure of the obtained yellow powder was identified using NMR.
- the structure of the obtained yellowish white powder was identified using NMR.
- the structure of the obtained yellow powder was identified using NMR.
- the compound of the present invention has a glass transition point of 100 ° C. or higher, or no glass transition point was observed. This indicates that the thin film state is stable in the compound of the present invention.
- a deposited film having a thickness of 100 nm was prepared on an ITO substrate, and the work function was measured with an atmospheric photoelectron spectrometer (AC-3 type, manufactured by Riken Keiki Co., Ltd.).
- Example 1 of the present invention (Compound 9) 5.89 eV Compound of Example 2 of the present invention (Compound 10) 5.94 eV Compound of Example 3 of the present invention (Compound 42) 5.91 eV Compound of the present Example 4 (Compound 45) 5.96 eV Compound of Example 5 of the present invention (Compound 52) 5.96 eV Compound of Example 6 of the present invention (Compound 55) 5.90 eV Compound of Example 7 of the present invention (Compound 59) 5.90 eV Compound of Example 8 of the present invention (Compound 61) 5.91 eV Compound of Example 9 of the present invention (Compound 87) 5.89 eV
- the compound of Example 10 of the present invention (Compound 89) 5.80 eV Compound of Example 11 of the present invention (Compound 3) 5.89 eV Compound of Example 12 of the present invention (Compound 6) 6.34 eV Compound of Example 13 of the present invention (Compound 15) 5.92 eV
- the compound of the present invention has a value larger than the work function 5.4 eV of a general hole transport material such as NPD or TPD, and has a large hole blocking ability.
- the heat resistance test was performed as follows. That is, 10 mg each of the compound of the present invention was put in a glass test tube and evacuated using a diaphragm pump, and then the end of the glass test tube was sealed. The sealed glass test tube was placed in a thermostat set to a predetermined temperature of 300 ° C. to 350 ° C., allowed to stand for 1 week, then unsealed, and used as a sample after the test.
- the compound of the present invention is stably present under a high temperature condition with a purity decrease of less than 5% in terms of peak area percentage.
- the decrease in purity is 5% or more in terms of peak area percentage, which indicates that the compound of the present invention is excellent in heat resistance.
- the organic EL element has a hole injection layer 3, a hole transport layer 4, a light emitting layer 5, and a hole blocking layer on a glass substrate 1 on which an ITO electrode is previously formed as a transparent anode 2.
- the layer 6, the electron transport layer 7, the electron injection layer 8, and the cathode (aluminum electrode) 9 were deposited in this order.
- the glass substrate 1 on which ITO with a film thickness of 150 nm was formed was washed with an organic solvent, the surface was washed by oxygen plasma treatment. Then, this glass substrate with an ITO electrode was mounted in a vacuum vapor deposition machine and the pressure was reduced to 0.001 Pa or less. Subsequently, as the hole injection layer 3 so as to cover the transparent anode 2, a compound 121 having the following structural formula was formed at a deposition rate of 6 nm / min so as to have a film thickness of 20 nm.
- a compound 122 having the following structural formula was formed as the hole transport layer 4 so as to have a film thickness of 40 nm at a deposition rate of 6 nm / min.
- a film thickness of 30 nm To form a film thickness of 30 nm.
- the compound (compound 9) of Example 1 of the present invention was formed as a hole blocking layer / electron transport layer 6 and 7 so as to have a film thickness of 30 nm at a deposition rate of 6 nm / min.
- lithium fluoride was formed as the electron injection layer 8 so as to have a film thickness of 0.5 nm at a deposition rate of 0.6 nm / min.
- aluminum was deposited to a thickness of 150 nm to form the cathode 9.
- the characteristic measurement was performed at normal temperature in air
- Table 1 summarizes the measurement results of the light emission characteristics when a DC voltage was applied to the organic EL device produced using the compound of Example 1 (Compound 9) of the present invention.
- Example 27 instead of the compound (Compound 9) of Example 1 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 10) of Example 2 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 27 instead of the compound of Example 1 of the present invention (Compound 9) as the material for the hole blocking layer / electron transport layers 6 and 7, the compound of Compound 3 of the present invention (Compound 42) has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 27 instead of the compound (Compound 9) of Example 1 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 45) of Example 4 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 27 instead of the compound of Example 1 of the present invention (Compound 9) as the material of the hole blocking layer / electron transport layers 6 and 7, the compound of Compound 5 of the present invention (Compound 52) has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 27 instead of the compound (Compound 9) of Example 1 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 55) of Example 6 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 27 instead of the compound of Example 1 of the present invention (Compound 9) as the material of the hole blocking layer / electron transport layers 6 and 7, the compound of Compound 7 of the present invention (Compound 59) has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 27 instead of the compound (Compound 9) of Example 1 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 61) of Example 8 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 27 instead of the compound (Compound 9) of Example 1 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 87) of Example 9 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 27 instead of the compound (Compound 9) of Example 1 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 89) of Example 10 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 27 instead of the compound (Compound 9) of Example 1 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 86) of Example 21 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 27 instead of the compound (Compound 9) of Example 1 of the present invention as the material for the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 88) of Example 22 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 1 For comparison, an organic EL device was produced under the same conditions as in Example 27, except that the material of the hole blocking layer / electron transport layers 6 and 7 in Example 27 was replaced with Alq 3 as the electron transport layer 7. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- the driving voltage at a current density of 10 mA / cm 2 was lowered to 3.78 to 5.55 V in Examples 27 to 38 with respect to 5.80 V of Alq 3 , and the current was further reduced. All of luminance, luminous efficiency, and power efficiency at a density of 10 mA / cm 2 were improved.
- the organic EL element has a hole transport layer 4, a light emitting layer 5, a hole blocking layer 6, an electron transport layer on a glass substrate 1 on which an ITO electrode is previously formed as a transparent anode 2 as shown in FIG. 7, an electron injection layer 8 and a cathode (aluminum electrode) 9 were deposited in this order.
- the glass substrate 1 on which ITO with a film thickness of 150 nm was formed was washed with an organic solvent, the surface was washed by oxygen plasma treatment. Then, this glass substrate with an ITO electrode was mounted in a vacuum vapor deposition machine and the pressure was reduced to 0.001 Pa or less. Subsequently, the compound 122 having the above structural formula was formed as the hole transport layer 4 so as to cover the transparent anode 2 so as to have a film thickness of 60 nm at a deposition rate of 6 nm / min.
- the compound (Compound 15) of Example 13 of the present invention was formed as a hole blocking layer / electron transport layer 6 and 7 so as to have a film thickness of 30 nm at a deposition rate of 6 nm / min.
- lithium fluoride was formed as the electron injection layer 8 so as to have a film thickness of 0.5 nm at a deposition rate of 0.6 nm / min. Finally, aluminum was deposited to a thickness of 150 nm to form the cathode 9. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Table 2 summarizes the measurement results of the light emission characteristics when a DC voltage was applied to the organic EL device produced using the compound of Example 13 (Compound 15) of the present invention.
- Example 39 instead of the compound (Compound 15) of Example 13 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 18) of Example 14 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 39 instead of the compound (Compound 15) of Example 13 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 31) of Example 15 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 39 instead of the compound (Compound 15) of Example 13 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 32) of Example 16 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 39 instead of the compound (Compound 15) of Example 13 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 80) of Example 20 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 39 instead of the compound (Compound 15) of Example 13 of the present invention as the material of the hole blocking layer / electron transport layers 6 and 7, the compound (Compound 88) of Example 22 of the present invention has a thickness of 30 nm.
- An organic EL element was produced under the same conditions except that the above was formed. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 2 For comparison, an organic EL device was produced under the same conditions as in Example 39, except that the material of the hole blocking layer / electron transport layers 6 and 7 in Example 39 was replaced with Alq 3 as the electron transport layer 7. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- the driving voltage at a current density of 10 mA / cm 2 was lowered to 3.74 to 5.22 V in Examples 39 to 44 compared to 5.26 V for Alq 3 , and the current was further reduced. All of luminance, luminous efficiency, and power efficiency at a density of 10 mA / cm 2 were improved.
- the organic EL device of the present invention is superior in luminous efficiency as compared with a device using Alq 3 which is used as a general electron transport material, and further a remarkable reduction in practical driving voltage is achieved. I knew it was possible.
- the compound having a substituted anthracene ring structure and pyridoindole ring structure of the present invention has good electron injection properties, excellent hole blocking ability, excellent heat resistance, and stable thin film state. It is excellent as a compound for organic EL devices. By producing an organic EL element using the compound, high efficiency can be obtained, driving voltage can be lowered, and durability can be improved. For example, it has become possible to develop home appliances and lighting.
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Abstract
Description
窒素置換した反応容器に、5-(4-ブロモ-3-メチルフェニル)-5H-ピリド[4,3-b]インドール3.3g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-フェニルアントラセン3.7g、テトラキス(トリフェニルホスフィン)パラジウム0.57g、2M炭酸カリウム水溶液24ml、トルエン80ml、エタノール20mlを加えて加熱し、攪拌しながら16時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をカラムクロマトグラフ(担体:NHシリカゲル、溶離液:トルエン/ヘキサン)によって精製し、5-〔3-メチル-4-(10-フェニルアントラセン-9-イル)フェニル〕-5H-ピリド[4,3-b]インドール(化合物9)2.8g(収率56%)の淡黄色粉体を得た。
窒素置換した反応容器に、5-(4-ブロモ-3-メチルフェニル)-5H-ピリド[4,3-b]インドール2.4g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-(ナフタレン-2-イル)アントラセン3.7g、テトラキス(トリフェニルホスフィン)パラジウム0.41g、2M炭酸カリウム水溶液18ml、トルエン64ml、エタノール16mlを加えて加熱し、攪拌しながら16時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をカラムクロマトグラフ(担体:NHシリカゲル、溶離液:トルエン/シクロヘキサン)によって精製し、5-〔3-メチル-4-{10-(ナフタレン-2-イル)アントラセン-9-イル}フェニル〕-5H-ピリド[4,3-b]インドール(化合物10)2.6g(収率65%)の淡黄色粉体を得た。
窒素置換した反応容器に、5-(4-ブロモナフタレン-1-イル)-5H-ピリド[4,3-b]インドール3.1g、10-フェニルアントラセン-9-ボロン酸3.0g、テトラキス(トリフェニルホスフィン)パラジウム0.48g、2M炭酸カリウム水溶液21ml、トルエン70ml、エタノール18mlを加えて加熱し、攪拌しながら6時間還流した。室温まで冷却し、ろ過によって析出物を採取した。析出物をo-ジクロロベンゼンに加熱溶解し、不溶物をろ過によって除いた後、ろ液を減圧下で濃縮することによって粗製物を得た。粗製物をo-ジクロロベンゼン/酢酸エチルによる再結晶によって精製し、5-〔4-(10-フェニルアントラセン-9-イル)ナフタレン-1-イル〕-5H-ピリド[4,3-b]インドール(化合物42)1.6g(収率36%)の黄色粉体を得た。
窒素置換した反応容器に、5-(4-ブロモナフタレン-1-イル)-5H-ピリド[4,3-b]インドール3.2g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-(ナフタレン-2-イル)アントラセン4.4g、テトラキス(トリフェニルホスフィン)パラジウム0.50g、2M炭酸カリウム水溶液21ml、トルエン70ml、エタノール18mlを加えて加熱し、攪拌しながら9時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をトルエン/ヘキサンによる再結晶によって精製し、5-〔4-{10-(ナフタレン-2-イル)アントラセン-9-イル}ナフタレン-1-イル〕-5H-ピリド[4,3-b]インドール(化合物45)1.7g(収率33%)の黄色粉体を得た。
窒素置換した反応容器に、5-(6-ブロモナフタレン-2-イル)-5H-ピリド[4,3-b]インドール2.7g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-フェニルアントラセン3.3g、テトラキス(トリフェニルホスフィン)パラジウム0.42g、2M炭酸カリウム水溶液18ml、トルエン60ml、エタノール15mlを加えて加熱し、攪拌しながら12時間還流した。室温まで冷却し、ろ過によって析出物を採取した。析出物をo-ジクロロベンゼンに加熱溶解し、不溶物をろ過によって除いた後、ろ液を減圧下で濃縮することによって粗製物を得た。粗製物をo-ジクロロベンゼン/酢酸エチルによる再結晶によって精製し、5-〔6-(10-フェニルアントラセン-9-イル)ナフタレン-2-イル〕-5H-ピリド[4,3-b]インドール(化合物52)1.5g(収率38%)の褐白色粉体を得た。
窒素置換した反応容器に、5-(6-ブロモナフタレン-2-イル)-5H-ピリド[4,3-b]インドール3.6g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-(ナフタレン-2-イル)アントラセン5.0g、テトラキス(トリフェニルホスフィン)パラジウム0.56g、2M炭酸カリウム水溶液24ml、トルエン80ml、エタノール20mlを加えて加熱し、攪拌しながら12時間還流した。室温まで冷却し、ろ過によって析出物を採取した。析出物をo-ジクロロベンゼンに加熱溶解し、不溶物をろ過によって除いた後、ろ液を減圧下で濃縮することによって粗製物を得た。粗製物をo-ジクロロベンゼン/酢酸エチルによる再結晶によって精製し、5-〔6-{10-(ナフタレン-2-イル)アントラセン-9-イル}ナフタレン-2-イル〕-5H-ピリド[4,3-b]インドール(化合物55)2.3g(収率40%)の黄緑色粉体を得た。
窒素置換した反応容器に、5-(4’-ブロモビフェニル-4-イル)-5H-ピリド[4,3-b]インドール3.5g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-フェニルアントラセン4.7g、テトラキス(トリフェニルホスフィン)パラジウム0.51g、2M炭酸カリウム水溶液22ml、トルエン112ml、エタノール28mlを加えて加熱し、攪拌しながら8時間還流した。室温まで冷却し、ろ過によって析出物を採取した。析出物をo-ジクロロベンゼンに加熱溶解し、不溶物をろ過によって除いた後、ろ液を減圧下で濃縮することによって粗製物を得た。粗製物をトルエンによる加熱しながらの分散洗浄を行うことによって精製し、5-〔4’-(10-フェニルアントラセン-9-イル)ビフェニル-4-イル〕-5H-ピリド[4,3-b]インドール(化合物59)3.1g(収率62%)の黄白色粉体を得た。
窒素置換した反応容器に、5-(4’-ブロモビフェニル-4-イル)-5H-ピリド[4,3-b]インドール3.2g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-(ナフタレン-2-イル)アントラセン5.2g、テトラキス(トリフェニルホスフィン)パラジウム0.47g、2M炭酸カリウム水溶液20ml、トルエン104ml、エタノール26mlを加えて加熱し、攪拌しながら8時間還流した。室温まで冷却し、ろ過によって析出物を採取した。析出物をo-ジクロロベンゼンに加熱溶解し、不溶物をろ過によって除いた後、ろ液を減圧下で濃縮することによって粗製物を得た。粗製物をトルエンによる加熱しながらの分散洗浄を行うことによって精製し、5-〔4’-{10-(ナフタレン-2-イル)アントラセン-9-イル}ビフェニル-4-イル〕-5H-ピリド[4,3-b]インドール(化合物61)2.5g(収率49%)の黄白色粉体を得た。
窒素置換した反応容器に、5-〔6-(3-ブロモフェニル)ピリジン-2-イル〕-5H-ピリド[4,3-b]インドール2.7g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-(ナフタレン-2-イル)アントラセン2.2g、テトラキス(トリフェニルホスフィン)パラジウム0.32g、2M炭酸カリウム水溶液8ml、トルエン16ml、エタノール4mlを加えて加熱し、攪拌しながら9時間還流した。室温まで冷却し、ろ過によって析出物を採取した。析出物をo-ジクロロベンゼンに加熱溶解し、不溶物をろ過によって除いた後、ろ液を減圧下で濃縮することによって粗製物を得た。粗製物を酢酸エチルによる加熱しながらの分散洗浄を行うことによって精製し、5-〔6-[3-{10-(ナフタレン-2-イル)アントラセン-9-イル}フェニル]ピリジン-2-イル〕-5H-ピリド[4,3-b]インドール(化合物87)1.6g(収率47%)の黄白色粉体を得た。
窒素置換した反応容器に、5-〔6-(4-ブロモフェニル)ピリジン-2-イル〕-5H-ピリド[4,3-b]インドール3.0g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-(ナフタレン-2-イル)アントラセン3.9g、テトラキス(トリフェニルホスフィン)パラジウム0.43g、2M炭酸カリウム水溶液19ml、トルエン60ml、エタノール15mlを加えて加熱し、攪拌しながら11時間還流した。室温まで冷却し、ろ過によって析出物を採取した。析出物をo-ジクロロベンゼンに加熱溶解し、不溶物をろ過によって除いた後、ろ液を減圧下で濃縮することによって粗製物を得た。粗製物を酢酸エチルによる加熱しながらの分散洗浄を行うことによって精製し、5-〔6-[4-{10-(ナフタレン-2-イル)アントラセン-9-イル}フェニル]ピリジン-2-イル〕-5H-ピリド[4,3-b]インドール(化合物89)2.0g(収率42%)の黄白色粉体を得た。
窒素置換した反応容器に、5-(4-ブロモフェニル)-5H-ピリド[4,3-b]インドール2.5g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-フェニルアントラセン3.8g、テトラキス(トリフェニルホスフィン)パラジウム0.45g、2M炭酸カリウム水溶液40ml、トルエン240ml、エタノール60mlを加えて加熱し、攪拌しながら16時間還流した。室温まで冷却し、ろ過によって析出物を採取した。析出物をo-ジクロロベンゼンに加熱溶解し、不溶物をろ過によって除いた後、ろ液を減圧下で濃縮することによって粗製物を得た。粗製物をトルエンによる加熱しながらの分散洗浄を行うことによって精製し、5-〔4-(10-フェニルアントラセン-9-イル)フェニル〕-5H-ピリド[4,3-b]インドール(化合物3)1.9g(収率49%)の黄白色粉体を得た。
窒素置換した反応容器に、5-(4-ブロモフェニル)-5H-ピリド[4,3-b]インドール3.0g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-(ナフタレン-2-イル)アントラセン4.0g、テトラキス(トリフェニルホスフィン)パラジウム0.54g、2M炭酸カリウム水溶液46ml、トルエン240ml、エタノール60mlを加えて加熱し、攪拌しながら10時間還流した。室温まで冷却し、ろ過によって析出物を採取した。析出物をo-ジクロロベンゼンに加熱溶解し、不溶物をろ過によって除いた後、ろ液を減圧下で濃縮することによって粗製物を得た。粗製物をトルエンによる加熱しながらの分散洗浄を行うことによって精製し、5-〔4-{10-(ナフタレン-2-イル)アントラセン-9-イル}フェニル〕-5H-ピリド[4,3-b]インドール(化合物6)1.3g(収率26%)の黄色粉体を得た。
窒素置換した反応容器に、5-(4-ブロモフェニル)-8-フェニル-5H-ピリド[4,3-b]インドール3.5g、10-フェニルアントラセン-9-ボロン酸3.1g、テトラキス(トリフェニルホスフィン)パラジウム0.30g、2M炭酸カリウム水溶液21ml、トルエン56ml、エタノール14mlを加えて加熱し、攪拌しながら12時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をカラムクロマトグラフ(担体:NHシリカゲル、溶離液:トルエン)によって精製し、5-〔4-(10-フェニルアントラセン-9-イル)フェニル〕-8-フェニル-5H-ピリド[4,3-b]インドール(化合物15)3.3g(収率66%)の黄白色粉体を得た。
窒素置換した反応容器に、5-(4-ブロモフェニル)-8-フェニル-5H-ピリド[4,3-b]インドール3.2g、10-(ナフタレン-2-イル)アントラセン-9-ボロン酸3.4g、テトラキス(トリフェニルホスフィン)パラジウム0.28g、2M炭酸カリウム水溶液18ml、トルエン52ml、エタノール13mlを加えて加熱し、攪拌しながら11時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をカラムクロマトグラフ(担体:NHシリカゲル、溶離液:トルエン)によって精製し、5-〔4-{10-(ナフタレン-2-イル)アントラセン-9-イル}フェニル〕-8-フェニル-5H-ピリド[4,3-b]インドール(化合物18)3.7g(収率74%)の黄色粉体を得た。
窒素置換した反応容器に、5-(3-ブロモフェニル)-8-フェニル-5H-ピリド[4,3-b]インドール3.2g、10-フェニルアントラセン-9-ボロン酸3.1g、テトラキス(トリフェニルホスフィン)パラジウム0.31g、2M炭酸カリウム水溶液21ml、トルエン56ml、エタノール14mlを加えて加熱し、攪拌しながら7時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をトルエン/ヘキサンによる再結晶によって精製し、5-〔3-(10-フェニルアントラセン-9-イル)フェニル〕-8-フェニル-5H-ピリド[4,3-b]インドール(化合物31)3.6g(収率72%)の黄色粉体を得た。
窒素置換した反応容器に、5-(3-ブロモフェニル)-8-フェニル-5H-ピリド[4,3-b]インドール3.2g、10-(ナフタレン-2-イル)アントラセン-9-ボロン酸3.4g、テトラキス(トリフェニルホスフィン)パラジウム0.28g、2M炭酸カリウム水溶液20ml、トルエン52ml、エタノール13mlを加えて加熱し、攪拌しながら7時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をトルエン/メタノールによる再結晶によって精製し、5-〔3-{10-(ナフタレン-2-イル)アントラセン-9-イル}フェニル〕-8-フェニル-5H-ピリド[4,3-b]インドール(化合物32)2.2g(収率44%)の黄色粉体を得た。
窒素置換した反応容器に、3,5-ビス{5H-ピリド[4,3-b]インドール-5-イル}-ブロモベンゼン3.7g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-フェニルアントラセン2.9g、テトラキス(トリフェニルホスフィン)パラジウム0.44g、2M炭酸カリウム水溶液19ml、トルエン72ml、エタノール18mlを加えて加熱し、攪拌しながら21時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をカラムクロマトグラフ(担体:NHシリカゲル、溶離液:トルエン/酢酸エチル)によって精製し、3,5-ビス(5H-ピリド[4,3-b]インドール-5-イル)-(10-フェニルアントラセン-9-イル)ベンゼン(化合物35)2.9g(収率58%)の黄色粉体を得た。
窒素置換した反応容器に、3,5-ビス{5H-ピリド[4,3-b]インドール-5-イル}-ブロモベンゼン3.5g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-(ナフタレン-2-イル)アントラセン3.1g、テトラキス(トリフェニルホスフィン)パラジウム0.41g、2M炭酸カリウム水溶液21ml、トルエン72ml、エタノール18mlを加えて加熱し、攪拌しながら17時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をカラムクロマトグラフ(担体:NHシリカゲル、溶離液:トルエン)によって精製し、3,5-ビス(5H-ピリド[4,3-b]インドール-5-イル)-{10-(ナフタレン-2-イル)アントラセン-9-イル}ベンゼン(化合物36)1.2g(収率24%)の黄色粉体を得た。
窒素置換した反応容器に、5-〔5-(4-ブロモフェニル)ピリジン-2-イル〕-5H-ピリド[4,3-b]インドール1.8g、10-フェニルアントラセン-9-ボロン酸1.3g、テトラキス(トリフェニルホスフィン)パラジウム0.26g、2M炭酸カリウム水溶液7ml、トルエン32ml、エタノール8mlを加えて加熱し、攪拌しながら14時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をo-ジクロロベンゼンによる再結晶によって精製し、5-{5-〔4-(10-フェニルアントラセン-9-イル)フェニル〕ピリジン-2-イル}-5H-ピリド[4,3-b]インドール(化合物76)1.0g(収率39%)の黄色粉体を得た。
窒素置換した反応容器に、5-〔5-(3-ブロモフェニル)ピリジン-2-イル〕-5H-ピリド[4,3-b]インドール1.0g、10-フェニルアントラセン-9-ボロン酸1.0g、テトラキス(トリフェニルホスフィン)パラジウム0.15g、2M炭酸カリウム水溶液4ml、トルエン16ml、エタノール4mlを加えて加熱し、攪拌しながら8時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をカラムクロマトグラフ(担体:NHシリカゲル、溶離液:トルエン)によって精製し、5-{5-〔3-(10-フェニルアントラセン-9-イル)フェニル〕ピリジン-2-イル}-5H-ピリド[4,3-b]インドール(化合物80)1.1g(収率77%)の黄色粉体を得た。
窒素置換した反応容器に、5-〔6-(3-ブロモフェニル)ピリジン-2-イル〕-5H-ピリド[4,3-b]インドール2.5g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-フェニルアントラセン2.7g、テトラキス(トリフェニルホスフィン)パラジウム0.21g、2M炭酸カリウム水溶液9ml、トルエン16ml、エタノール4mlを加えて加熱し、攪拌しながら15時間還流した。室温まで冷却し、ろ過によって析出物を採取した。析出物をo-ジクロロベンゼンに加熱溶解し、不溶物をろ過によって除いた後、ろ液を減圧下で濃縮することによって粗製物を得た。粗製物をo-ジクロロベンゼン/酢酸エチルによる再結晶によって精製し、5-{6-〔3-(10-フェニルアントラセン-9-イル)フェニル〕ピリジン-2-イル}-5H-ピリド[4,3-b]インドール(化合物86)2.2g(収率61%)の黄色粉体を得た。
窒素置換した反応容器に、5-〔6-(4-ブロモフェニル)ピリジン-2-イル〕-5H-ピリド[4,3-b]インドール2.4g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-フェニルアントラセン3.4g、テトラキス(トリフェニルホスフィン)パラジウム0.35g、2M炭酸カリウム水溶液15ml、トルエン48ml、エタノール12mlを加えて加熱し、攪拌しながら12時間還流した。室温まで冷却し、ろ過によって析出物を採取した。析出物をo-ジクロロベンゼンに加熱溶解し、不溶物をろ過によって除いた後、ろ液を減圧下で濃縮することによって粗製物を得た。粗製物をo-ジクロロベンゼン/酢酸エチルによる再結晶によって精製し、5-{6-〔4-(10-フェニルアントラセン-9-イル)フェニル〕ピリジン-2-イル}-5H-ピリド[4,3-b]インドール(化合物88)2.2g(収率64%)の黄白色粉体を得た。
窒素置換した反応容器に、5-(3-ブロモフェニル)-5H-ピリド[4,3-b]インドール1.7g、9-(4,4,5,5-テトラメチル-[1,3,2]ジオキサボロラン-2-イル)-10-フェニルアントラセン2.0g、テトラキス(トリフェニルホスフィン)パラジウム0.30g、2M炭酸カリウム水溶液26ml、トルエン160ml、エタノール40mlを加えて加熱し、攪拌しながら20時間還流した。室温まで冷却し、トルエン100ml、水100mlを加えた後に攪拌し、有機層を分液した。有機層を無水硫酸マグネシウムで脱水した後、減圧下で濃縮することによって粗製物を得た。粗製物をトルエン/ヘキサンによる再結晶によって精製し、5-〔3-(10-フェニルアントラセン-9-イル)フェニル〕-5H-ピリド[4,3-b]インドール(化合物96)1.1g(収率42%)の黄白色粉体を得た。
融点 ガラス転移点
本発明実施例1の化合物(化合物9) 286℃ 132℃
本発明実施例2の化合物(化合物10) 316℃ 157℃
本発明実施例3の化合物(化合物42) 376℃ 164℃
本発明実施例4の化合物(化合物45) 317℃ 182℃
本発明実施例5の化合物(化合物52) 398℃ なし
本発明実施例6の化合物(化合物55) 434℃ 140℃
本発明実施例7の化合物(化合物59) 404℃ なし
本発明実施例8の化合物(化合物61) 409℃ なし
本発明実施例9の化合物(化合物87) 269℃ 150℃
本発明実施例10の化合物(化合物89) 310℃ 159℃
本発明実施例11の化合物(化合物3) 299℃ 130℃
本発明実施例12の化合物(化合物6) 280℃ 155℃
本発明実施例13の化合物(化合物15) 330℃ 148℃
本発明実施例14の化合物(化合物18) 312℃ 164℃
本発明実施例15の化合物(化合物31) 292℃ 134℃
本発明実施例16の化合物(化合物32) 306℃ 152℃
本発明実施例17の化合物(化合物35) 359℃ 173℃
本発明実施例18の化合物(化合物36) 412℃ 192℃
本発明実施例19の化合物(化合物76) 339℃ 140℃
本発明実施例20の化合物(化合物80) 165℃ 138℃
本発明実施例21の化合物(化合物86) 286℃ 132℃
本発明実施例22の化合物(化合物88) 331℃ 149℃
本発明実施例23の化合物(化合物96) 265℃ 115℃
仕事関数
本発明実施例1の化合物(化合物9) 5.89eV
本発明実施例2の化合物(化合物10) 5.94eV
本発明実施例3の化合物(化合物42) 5.91eV
本発明実施例4の化合物(化合物45) 5.96eV
本発明実施例5の化合物(化合物52) 5.96eV
本発明実施例6の化合物(化合物55) 5.90eV
本発明実施例7の化合物(化合物59) 5.90eV
本発明実施例8の化合物(化合物61) 5.91eV
本発明実施例9の化合物(化合物87) 5.89eV
本発明実施例10の化合物(化合物89) 5.80eV
本発明実施例11の化合物(化合物3) 5.89eV
本発明実施例12の化合物(化合物6) 6.34eV
本発明実施例13の化合物(化合物15) 5.92eV
本発明実施例14の化合物(化合物18) 5.91eV
本発明実施例15の化合物(化合物31) 5.99eV
本発明実施例16の化合物(化合物32) 6.01eV
本発明実施例17の化合物(化合物35) 6.24eV
本発明実施例18の化合物(化合物36) 6.36eV
本発明実施例19の化合物(化合物76) 5.89eV
本発明実施例20の化合物(化合物80) 5.99eV
本発明実施例21の化合物(化合物86) 5.92eV
本発明実施例22の化合物(化合物88) 5.92eV
本発明実施例23の化合物(化合物96) 5.96eV
耐熱試験の結果 [試験温度]
本発明実施例1の化合物(化合物9) ○ [300℃]
本発明実施例3の化合物(化合物42) ○ [350℃]
本発明実施例4の化合物(化合物45) ○ [330℃]
本発明実施例5の化合物(化合物52) ○ [350℃]
本発明実施例6の化合物(化合物55) ○ [350℃]
本発明実施例8の化合物(化合物61) ○ [350℃]
本発明実施例9の化合物(化合物87) ○ [330℃]
本発明実施例10の化合物(化合物89) ○ [340℃]
本発明実施例22の化合物(化合物88) ○ [340℃]
BCP(比較化合物) × [300℃]
比較のために、実施例27における正孔阻止層兼電子輸送層6および7の材料を電子輸送層7としてのAlq3に代え、実施例27と同様の条件で有機EL素子を作製した。作製した有機EL素子について、大気中、常温で特性測定を行なった。作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表1にまとめて示した。
有機EL素子 化合物 発光開始電圧[V]
実施例27 化合物9 3.0
実施例28 化合物10 2.9
実施例29 化合物42 2.9
実施例30 化合物45 2.8
実施例31 化合物52 2.9
実施例32 化合物55 2.9
実施例33 化合物59 2.8
実施例34 化合物61 2.9
実施例35 化合物87 2.9
実施例36 化合物89 2.8
実施例37 化合物86 2.8
実施例38 化合物88 2.8
比較例1 Alq3 3.2
その結果、Alq3を使用した比較例1に対し、実施例27~38では発光開始電圧を低電圧化していることが分かる。
比較のために、実施例39における正孔阻止層兼電子輸送層6および7の材料を電子輸送層7としてのAlq3に代え、実施例39と同様の条件で有機EL素子を作製した。作製した有機EL素子について、大気中、常温で特性測定を行なった。作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表2にまとめて示した。
有機EL素子 化合物 発光開始電圧[V]
実施例39 化合物9 2.9
実施例40 化合物10 3.0
実施例41 化合物42 2.8
実施例42 化合物45 2.9
実施例43 化合物52 2.8
実施例44 化合物55 2.7
比較例2 Alq3 3.1
その結果、Alq3を使用した比較例2に対し、実施例39~44では発光開始電圧を低電圧化していることが分かる。
2 透明陽極
3 正孔注入層
4 正孔輸送層
5 発光層
6 正孔阻止層
7 電子輸送層
8 電子注入層
9 陰極
Claims (11)
- 下記一般式(1)で表される、置換されたアントラセン環構造とピリドインドール環構造を有する化合物。
(1)
(式中、Arは置換もしくは無置換の芳香族炭化水素基または置換もしくは無置換の縮合多環芳香族基を表し、Aは置換もしくは無置換の芳香族炭化水素の2価基、置換もしくは無置換の芳香族複素環の2価基または置換もしくは無置換の縮合多環芳香族の2価基を表し、Bは単結合、あるいは置換もしくは無置換の芳香族炭化水素の2価基、置換もしくは無置換の芳香族複素環の2価基または置換もしくは無置換の縮合多環芳香族の2価基を表し、R1~R8は、同一でも異なってもよく水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基または置換もしくは無置換の縮合多環芳香族基を表し、W、X、Y、Zは炭素原子または窒素原子を表す。ここでW、X、Y、Zはそのいずれか1つのみが窒素原子であるものとし、この場合の窒素原子はR1~R4の置換基を有さないものとする。) - 前記一般式(1)においてAが置換もしくは無置換の芳香族炭化水素の2価基または置換もしくは無置換の縮合多環芳香族の2価基であって、Bが単結合である、請求項1記載の置換されたアントラセン環構造とピリドインドール環構造を有する化合物。
- 前記一般式(1)においてAが置換もしくは無置換の芳香族炭化水素の2価基または置換もしくは無置換の縮合多環芳香族の2価基であって、Bが置換もしくは無置換の芳香族複素環の2価基である、請求項1記載の置換されたアントラセン環構造とピリドインドール環構造を有する化合物。
- 前記一般式(1)においてAが置換もしくは無置換の芳香族複素環の2価基であって、Bが置換もしくは無置換の芳香族炭化水素の2価基または置換もしくは無置換の縮合多環芳香族の2価基である、請求項1記載の置換されたアントラセン環構造とピリドインドール環構造を有する化合物。
- 下記一般式(1')で表される、請求項1または請求項2記載の化合物。
(1')
(式中、Arは置換もしくは無置換の芳香族炭化水素基または置換もしくは無置換の縮合多環芳香族基を表し、R1~R8は、同一でも異なってもよく水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基または置換もしくは無置換の縮合多環芳香族基を表し、R9は、重水素原子、フッ素原子、塩素原子、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基または置換もしくは無置換の縮合多環芳香族基を表し、r9は0または1~4の整数を表し、R9を複数個有する場合は互いに同一でも異なってもよく、W、X、Y、Zは炭素原子または窒素原子を表す。ここでW、X、Y、Zはそのいずれか1つのみが窒素原子であるものとし、この場合の窒素原子はR1~R4の置換基を有さないものとする。) - 下記一般式(1'')で表される、請求項1または請求項4記載の化合物。
(1'')
(式中、Arは置換もしくは無置換の芳香族炭化水素基または置換もしくは無置換の縮合多環芳香族基を表し、R1~R8は、同一でも異なってもよく水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基または置換もしくは無置換の縮合多環芳香族基を表し、R9は、重水素原子、フッ素原子、塩素原子、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基または置換もしくは無置換の縮合多環芳香族基を表し、r9は0または1~4の整数を表し、R9を複数個有する場合は互いに同一でも異なってもよく、W、X、Y、Zは炭素原子または窒素原子を表す。ここでW、X、Y、Zはそのいずれか1つのみが窒素原子であるものとし、この場合の窒素原子はR1~R4の置換基を有さないものとする。) - 一対の電極とその間に挟まれた少なくとも一層の有機層を有する有機エレクトロルミネッセンス素子において、下記一般式(1)で表される置換されたアントラセン環構造とピリドインドール環構造を有する化合物が、少なくとも1つの前記有機層の構成材料として用いられていることを特徴とする有機エレクトロルミネッセンス素子。
(1)
(式中、Arは置換もしくは無置換の芳香族炭化水素基または置換もしくは無置換の縮合多環芳香族基を表し、Aは置換もしくは無置換の芳香族炭化水素の2価基、置換もしくは無置換の芳香族複素環の2価基または置換もしくは無置換の縮合多環芳香族の2価基を表し、Bは単結合、あるいは置換もしくは無置換の芳香族炭化水素の2価基、置換もしくは無置換の芳香族複素環の2価基または置換もしくは無置換の縮合多環芳香族の2価基を表し、R1~R8は、同一でも異なってもよく水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基または置換もしくは無置換の縮合多環芳香族基を表し、W、X、Y、Zは炭素原子または窒素原子を表す。ここでW、X、Y、Zはそのいずれか1つのみが窒素原子であるものとし、この場合の窒素原子はR1~R4の置換基を有さないものとする。) - 前記した有機層が電子輸送層であり、上記一般式(1)で表される化合物が、該電子輸送層中に、少なくとも一つの構成材料として用いられていることを特徴とする請求項7記載の有機エレクトロルミネッセンス素子。
- 前記した有機層が正孔阻止層であり、上記一般式(1)で表される化合物が、該正孔阻止層中に、少なくとも一つの構成材料として用いられていることを特徴とする請求項7記載の有機エレクトロルミネッセンス素子。
- 前記した有機層が発光層であり、上記一般式(1)で表される化合物が、該発光層中に、少なくとも一つの構成材料として用いられていることを特徴とする請求項7記載の有機エレクトロルミネッセンス素子。
- 前記した有機層が電子注入層であり、上記一般式(1)で表される化合物が、該電子注入層中に、少なくとも一つの構成材料として用いられていることを特徴とする請求項7記載の有機エレクトロルミネッセンス素子。
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| KR1020127004120A KR101786129B1 (ko) | 2009-08-05 | 2010-07-28 | 치환된 안트라센환 구조와 피리도인돌환 구조를 갖는 화합물 및 유기 전계 발광소자 |
| CN201080034572.1A CN102482274B (zh) | 2009-08-05 | 2010-07-28 | 具有被取代了的蒽环结构和吡啶并吲哚环结构的化合物以及有机电致发光器件 |
| EP10806202.7A EP2463287B1 (en) | 2009-08-05 | 2010-07-28 | Compound having substituted anthracene ring structure and pyridoindole ring structure and organic electroluminescence device |
| JP2011525754A JP5636368B2 (ja) | 2009-08-05 | 2010-07-28 | 置換されたアントラセン環構造とピリドインドール環構造を有する化合物および有機エレクトロルミネッセンス素子 |
| US13/388,123 US8927119B2 (en) | 2009-08-05 | 2010-07-28 | Compound having substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device |
| US14/552,576 US9755152B2 (en) | 2009-08-05 | 2014-11-25 | Compound having substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device |
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| US13/388,123 A-371-Of-International US8927119B2 (en) | 2009-08-05 | 2010-07-28 | Compound having substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device |
| US14/552,576 Continuation US9755152B2 (en) | 2009-08-05 | 2014-11-25 | Compound having substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device |
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| EP (1) | EP2463287B1 (ja) |
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| WO2018181370A1 (ja) * | 2017-03-28 | 2018-10-04 | 保土谷化学工業株式会社 | アザカルバゾール構造を有する化合物および有機エレクトロルミネッセンス素子 |
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| CN101506207B (zh) * | 2006-08-18 | 2013-11-13 | 保土谷化学工业株式会社 | 具有其上连结有取代的吡啶基的吡啶并吲哚环结构的化合物和有机电致发光器件 |
| US9490444B2 (en) * | 2011-08-03 | 2016-11-08 | Joled Inc. | Organic light-emitting element with regulation insulating layer and two-component electron transport layer and method of making |
| KR102051952B1 (ko) * | 2013-01-08 | 2019-12-04 | 에스에프씨주식회사 | 헤테로아릴 치환기를 갖는 나프틸기를 포함하는 안트라센 유도체 및 이를 포함하는 유기 발광 소자 |
| KR102030388B1 (ko) * | 2013-01-08 | 2019-10-10 | 에스에프씨주식회사 | 두 개의 나프틸기를 포함하는 비대칭 안트라센 유도체 및 이를 포함하는 유기 발광 소자 |
| KR102248083B1 (ko) * | 2013-01-09 | 2021-05-04 | 에스에프씨주식회사 | 두 개의 페닐기를 포함하는 비대칭 안트라센 유도체 및 이를 포함하는 유기 발광 소자 |
| KR102030587B1 (ko) * | 2013-01-09 | 2019-10-10 | 에스에프씨주식회사 | 두 개의 나프틸기를 포함하는 비대칭 안트라센 유도체 및 이를 포함하는 유기 발광 소자 |
| KR101847431B1 (ko) * | 2015-04-20 | 2018-04-10 | 에스에프씨주식회사 | 유기 발광 소자 |
| CN106449882B (zh) * | 2016-11-04 | 2018-02-09 | 杭州纤纳光电科技有限公司 | 一种掺杂蒽类有机化合物薄膜的制备方法及其应用 |
| CN110845496A (zh) * | 2019-11-21 | 2020-02-28 | 吉林奥来德光电材料股份有限公司 | 一种电子传输材料及其合成方法与应用 |
| CN116471863A (zh) * | 2022-01-11 | 2023-07-21 | Tcl科技集团股份有限公司 | 复合材料、发光二极管及制备方法和显示装置 |
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| TWI476196B (zh) | 2015-03-11 |
| US8927119B2 (en) | 2015-01-06 |
| US20120126220A1 (en) | 2012-05-24 |
| KR101786129B1 (ko) | 2017-10-17 |
| US20150155496A1 (en) | 2015-06-04 |
| EP2463287B1 (en) | 2015-03-18 |
| JP5636368B2 (ja) | 2014-12-03 |
| US9755152B2 (en) | 2017-09-05 |
| CN102482274A (zh) | 2012-05-30 |
| JPWO2011016202A1 (ja) | 2013-01-10 |
| KR20120051700A (ko) | 2012-05-22 |
| EP2463287A1 (en) | 2012-06-13 |
| TW201129563A (en) | 2011-09-01 |
| EP2463287A4 (en) | 2012-11-07 |
| CN102482274B (zh) | 2017-03-01 |
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