WO2010064627A1 - 1,3,5-トリアジン誘導体とその製造方法、及びそれらを構成成分とする有機電界発光素子 - Google Patents
1,3,5-トリアジン誘導体とその製造方法、及びそれらを構成成分とする有機電界発光素子 Download PDFInfo
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- WO2010064627A1 WO2010064627A1 PCT/JP2009/070170 JP2009070170W WO2010064627A1 WO 2010064627 A1 WO2010064627 A1 WO 2010064627A1 JP 2009070170 W JP2009070170 W JP 2009070170W WO 2010064627 A1 WO2010064627 A1 WO 2010064627A1
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Definitions
- the present invention relates to a 1,3,5-triazine derivative having a quateraryrenyl group containing a pyridyl group, which is useful as a component of an organic electroluminescent device, a method for producing the same, and an organic electroluminescent device containing the same It is.
- the 1,3,5-triazine derivative of the present invention is useful as a component of an organic electroluminescent device because it has good charge transport properties. Therefore, the present invention further relates to an organic electroluminescence device excellent in drivability and durability, wherein the 1,3,5-triazine derivative is used in at least one organic compound layer of the organic electroluminescence device.
- a 1,3,5-triazine derivative is used in an organic electroluminescent device (for example, see Patent Documents 5 and 6) have been disclosed.
- the position of the group is not limited, and the 1,3,5-triazine derivative of the present invention characterized by having a quaterarylenyl group containing a pyridyl group at the 2,4 position is specifically shown. Absent.
- triazine derivatives having a quaterarylenyl group containing a pyridyl group in a triazine ring used in an organic electroluminescent device are disclosed.
- examples of 1,3,5-triazine derivatives used in organic electroluminescent devices are disclosed, and these have a 3,5-disubstituted phenyl group at the 2-position of the triazine ring.
- the triazine derivative is different from the 1,3,5-triazine derivative of the present invention.
- An object of the present invention is to provide a 1,3,5-triazine derivative having a novel structure, which can be driven at a low voltage when used as a constituent material of an organic electroluminescent device, and gives a long-life organic electroluminescent device. Is to provide.
- Another object of the present invention is to provide an industrially advantageous method for producing the 1,3,5-triazine derivative.
- Still another object of the present invention is to provide an organic electroluminescent device which can be driven at a low voltage and has a long lifetime.
- the 1,3,5-triazine derivative (1) of the present invention is an amorphous thin film by a general method such as vacuum deposition.
- the present invention is completed by finding that organic electroluminescent elements that can be formed and used as an electron transport layer can achieve lower power consumption and longer life than general-purpose organic electroluminescent elements. It came to.
- the present invention provides, in one aspect, the following general formula (1) (Wherein R 1 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an optionally substituted phenyl group.
- N represents an integer of 1 to 3, and when n is 2 or 3, R 1 represents May be the same or different,
- Ar represents an optionally substituted aromatic hydrocarbon group, provided that Ar represents two substituted quarterarylenyls bonded to the 1,3,5-triazine ring.
- V and Y each represent a nitrogen atom or a carbon atom, provided that V and Y cannot simultaneously be a carbon atom).
- R 1 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an optionally substituted phenyl group.
- N represents an integer of 1 to 3, and when n is 2 or 3, R 1 represents May be the same or different,
- Ar represents an optionally substituted aromatic hydrocarbon group, provided that Ar represents two substituted quarterarylenyls bonded to the 1,3,5-triazine ring.
- X 1 represents a leaving group.
- V and Y each represent a nitrogen atom or a carbon atom, provided that V and Y cannot simultaneously be a carbon atom.
- M represents a metal group or a heteroatom group.
- M represents a metal group or a heteroatom group.
- R 1 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an optionally substituted phenyl group.
- N represents an integer of 1 to 3, and when n is 2 or 3, R 1 represents May be the same or different,
- Ar represents an optionally substituted aromatic hydrocarbon group, provided that Ar represents two substituted quarterarylenyls bonded to the 1,3,5-triazine ring.
- R 3 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a phenyl group, and two R 3 of B (OR 3 ) 2 may be the same or different.
- R 1 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an optionally substituted phenyl group.
- N represents an integer of 1 to 3, and when n is 2 or 3, R 1 represents May be the same or different,
- Ar represents an optionally substituted aromatic hydrocarbon group, provided that Ar represents two substituted quarterarylenyls bonded to the 1,3,5-triazine ring.
- V and Y each represent a nitrogen atom or a carbon atom, provided that V and Y cannot simultaneously be carbon atoms.
- An organic electroluminescent device is provided.
- FIG. 1 is a diagram schematically showing an example of a cross-sectional structure of an organic electroluminescence device having a thin film layer made of a 1,3,5-triazine derivative of the present invention.
- FIG. 1 is a diagram schematically showing an example of a cross-sectional structure of an organic electroluminescence device having a thin film layer made of a 1,3,5-triazine derivative of the present invention.
- the optionally substituted aromatic hydrocarbon group represented by Ar includes an optionally substituted phenyl group, an optionally substituted naphthyl group, and optionally substituted.
- examples include an anthryl group, an optionally substituted perylenyl group, and an optionally substituted triphenylenyl group.
- the phenyl group which may be substituted and the naphthyl group which may be substituted are preferable in terms of performance as a material for an organic electroluminescent element, and in terms of easy synthesis, unsubstituted, methyl substituted, phenyl substituted or More preferred is a phenyl disubstituted phenyl group or a naphthyl group.
- this invention is not limited to these.
- the optionally substituted phenyl group include a phenyl group, p-tolyl group, m-tolyl group, o-tolyl group, 4-trifluoromethylphenyl group, 3-trifluoromethylphenyl group, 2-trifluoromethylphenyl group, 2,4-dimethylphenyl group, 3,5-dimethylphenyl group, 2,6-dimethylphenyl group, mesityl group, 2-ethylphenyl group, 3-ethylphenyl group, 4-ethyl Phenyl group, 2,4-diethylphenyl group, 3,5-diethylphenyl group, 2-propylphenyl group, 3-propylphenyl group, 4-propylphenyl group, 2,4-dipropylphenyl group, 3,5- Dipropylphenyl group, 2-isopropylphenyl group, 3-isopropylphenyl group, 4-isopropylphenyl group,
- naphthyl group which may be substituted include 1-naphthyl group and 2-naphthyl group, 4-methylnaphthalen-1-yl group, 4-trifluoromethylnaphthalen-1-yl group, 4-ethylnaphthalen-1-yl group, 4-propylnaphthalen-1-yl group, 4-butylnaphthalen-1-yl group, 4-tert-butylnaphthalen-1-yl group, 5-methylnaphthalen-1-yl Group, 5-trifluoromethylnaphthalen-1-yl group, 5-ethylnaphthalen-1-yl group, 5-propylnaphthalen-1-yl group, 5-butylnaphthalen-1-yl group, 5-tert-butylnaphthalene -1-yl group, 6-methylnaphthalen-2-yl group, 6-trifluoromethylnaphthalen-2-yl group, 6-ethylnaphthalen-2-yl group, 6-
- Ar is not the same as two substituted quaterarylenyl groups bonded to the 1,3,5-triazine ring.
- Ar and the above two substituted quaterarylenyl groups are the same, the 1,3,5-triazine derivative has increased crystallinity, and the organic electroluminescent device having the thin film layer is Characteristics such as long-term stability are not sufficient.
- Compound (1) has the following reaction formula:
- R 1 , n, Ar, X 1 , V, Y and M are as described above).
- the leaving group represented by X 1 represents a chlorine atom, a bromine atom or an iodine atom. A bromine atom or a chlorine atom is preferable in terms of good yield.
- the metal group represented by M is not particularly limited as long as it is used for a general coupling reaction, and may include an alkali metal atom, an alkaline earth metal atom, or a group 8 to 13 metal atom. These are each a halogen atom, an alkyl group having 1 to 4 carbon atoms, an aromatic hydrocarbon group having 6 to 10 carbon atoms, an alkoxy group having 1 to 6 carbon atoms or an aryloxy group having 6 to 10 carbon atoms, and 3 to 3 carbon atoms. It may be substituted with 16 tertiary amines or aromatic imines having 6 to 20 carbon atoms.
- ZnR 2 ZnCl, ZnBr, and ZnI.
- ZnCl is preferable as the metal group because it is easy to prepare, and substituted ZnCl (TMEDA) coordinated with tetramethylethylenediamine is preferable as the metal group. More preferred.
- the heteroatom group represented by M is not particularly limited as long as it is used for a general coupling reaction, and examples thereof include a boron atom, a silicon atom, a germane atom, a tin atom, and the like. It may be substituted with a halogen atom, an alkyl group having 1 to 4 carbon atoms, an aromatic hydrocarbon group having 6 to 10 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryloxy group having 6 to 10 carbon atoms.
- Si (Ph) 3 , SnF 3 , B (OR 3 ) 2 (R 3 : a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a phenyl group) and the like can be exemplified, and B (OR 3 ) 2 Examples thereof include B (OH) 2 , B (OMe) 2 , B (OiPr) 2 , B (OBu) 2 , and B (OPh) 2 .
- Step 1 the compound (2) is reacted with the compound (3) in the presence of a base and optionally in the presence of a palladium catalyst to produce the 1,3,5-triazine derivative (1) of the present invention.
- reaction conditions for general coupling reactions such as Suzuki-Miyaura reaction, Negishi reaction, Tamao-Kumada reaction, Stille reaction, etc.
- the target product can be obtained in good yield.
- the palladium catalyst that can be used in “Step 1” include salts of palladium chloride, palladium acetate, palladium trifluoroacetate, palladium nitrate, and the like. Furthermore, ⁇ -allyl palladium chloride dimer, palladium acetylacetonate, tris (dibenzylideneacetone) dipalladium, dichlorobis (triphenylphosphine) palladium, tetrakis (triphenylphosphine) palladium and dichloro (1,1′-bis (diphenylphosphine). Examples include complex compounds such as fino) ferrocene) palladium.
- a palladium complex having a tertiary phosphine as a ligand is preferable in terms of a good yield, is easily available, and a palladium complex having triphenylphosphine as a ligand is more preferable in terms of a good yield.
- the amount of the palladium catalyst used in “Step 1” is not particularly limited as long as it is a so-called catalyst amount. However, the molar ratio of the palladium catalyst to the compound (2) is 1:50 to 1: 10 is preferred.
- the palladium complex which has these tertiary phosphines as a ligand can also be prepared in a reaction system by adding a tertiary phosphine to a palladium salt or a complex compound.
- 2-dicyclohexylphosphino-2 ', 4', 6'-triisopropylbiphenyl or tri (tert-butyl) phosphine is preferred because it is readily available and yields are good.
- the molar ratio of the tertiary phosphine to the palladium salt or complex compound is preferably 1:10 to 10: 1, and more preferably 1: 2 to 5: 1 in terms of a good yield.
- the reaction of “Step 1” can improve the yield by carrying out the reaction in the presence of a base.
- the bases that can be used include sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, lithium carbonate, cesium carbonate, potassium acetate, sodium acetate, potassium phosphate, sodium phosphate, sodium fluoride, fluoride. Examples thereof include potassium chloride and cesium fluoride, and cesium carbonate or sodium hydroxide is preferable in terms of a good yield.
- the molar ratio of the base and the compound (3) is not particularly limited, but is preferably 1: 2 to 10: 1, and more preferably 1: 1 to 3: 1 in terms of good yield.
- Compound (1) can be obtained by performing a normal treatment after completion of “Step 1”. If necessary, it may be purified by recrystallization, column chromatography or sublimation.
- the 1,3,5-triazine derivative [compound (1)] of the present invention has the following reaction formula:
- R 1 , R 3 , n, Ar, V, Y and X 2 are as defined above).
- the leaving group represented by X 2 represents a chlorine atom, a bromine atom or an iodine atom.
- a bromine atom is preferable in terms of a good yield.
- the compound represented by the general formula (4) (hereinafter sometimes referred to as “compound (4)”) can be produced, for example, using the method shown in “Reference Example-8” described later.
- the compound represented by the above general formula (5) (hereinafter sometimes referred to as “compound (5)”) is produced, for example, using the method disclosed in Synlett, Vol. 6, 852-854, 2003. be able to.
- Preferred examples of the compound (5) include the following “5-1” to “5-37” (wherein X 2 represents a leaving group), but the present invention is not limited thereto. Is not to be done.
- Step 2 is a method in which compound (4) is reacted with compound (5) in the presence of a palladium catalyst and a base to obtain compound (1), and the reaction conditions of general Suzuki-Miyaura reaction are applied. As a result, the target product can be obtained with good yield.
- the palladium catalyst that can be used in “Step 2” include the palladium salts and complex compounds exemplified in “Step 1”. Among these, a palladium complex having a tertiary phosphine as a ligand is preferable in terms of a good yield, is easily available, and a palladium complex having triphenylphosphine as a ligand is particularly preferable in terms of a good yield.
- the amount of the palladium catalyst used in “Step 2” is not particularly limited as long as it is a so-called catalyst amount. However, the molar ratio of the palladium catalyst to the compound (4) is 1:50 to 1: 10 is preferred.
- a palladium complex having tertiary phosphine as a ligand can also be prepared in a reaction system by adding tertiary phosphine to a palladium salt or complex compound.
- tertiary phosphine examples include the tertiary phosphine exemplified in “Step 1”. Among them, triphenylphosphine is preferable because it is easily available and yield is good.
- the molar ratio of the tertiary phosphine to the palladium salt or complex compound is preferably 1:10 to 10: 1, and more preferably 1: 2 to 5: 1 in terms of a good yield.
- Step 2 must be carried out in the presence of a base.
- the base that can be used in “Step 2” include sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, lithium carbonate, cesium carbonate, potassium acetate, sodium acetate, potassium phosphate, sodium phosphate, sodium fluoride. , Potassium fluoride, cesium fluoride and the like, and sodium carbonate is preferable in terms of a good yield.
- the molar ratio of base to compound (4) is not particularly limited, but is preferably 1: 2 to 10: 1, and more preferably 1: 1 to 3: 1 in terms of good yield.
- the reaction of “Step 2” can be carried out in a solvent.
- the solvent that can be used in “Step 2” include water, dimethyl sulfoxide, dimethylformamide, tetrahydrofuran, toluene, benzene, diethyl ether, ethanol, methanol, and xylene, and these may be used in appropriate combination. It is desirable to use a mixed solvent of toluene and water in terms of good yield.
- Compound (1) can be obtained by carrying out a normal treatment after completion of “Step 2”. If necessary, it may be purified by recrystallization, column chromatography or sublimation.
- Compound (4) which is a raw material of “Step 2” for producing compound (1), is, for example, the following reaction formula:
- compound (2) is a borane compound represented by general formula (6) (hereinafter sometimes referred to as “compound (6)”) or general formula (7 ) (Hereinafter sometimes referred to as “compound (7)”) to produce the compound (4) used in “step 2”.
- compound (6) a borane compound represented by general formula (6)
- compound (7) general formula (7 )
- the target product can be obtained in good yield.
- a palladium complex having tertiary phosphine as a ligand can also be prepared in a reaction system by adding tertiary phosphine to a palladium salt or complex compound.
- tertiary phosphine that can be added to the palladium salt or complex compound include the tertiary phosphine exemplified in “Step 1”. Among them, triphenylphosphine is preferable because it is easily available.
- the molar ratio of the tertiary phosphine to the palladium salt or complex compound is preferably 1:10 to 10: 1, and more preferably 1: 2 to 5: 1 in terms of a good yield.
- the reaction of “Step 3” can be carried out in a solvent.
- the solvent that can be used in “Step 3” include water, dimethyl sulfoxide, dimethylformamide, tetrahydrofuran, toluene, benzene, diethyl ether, ethanol, methanol, and xylene, and these may be used in appropriate combination. It is desirable to use tetrahydrofuran in terms of a good yield.
- the compound (4) obtained in this step may be isolated after the reaction or may be subjected to “Step 2” without isolation.
- the method for producing a thin film for an organic electroluminescence device comprising the 1,3,5-triazine derivative [compound (1)] of the present invention is not particularly limited, but it can be formed by a vacuum deposition method. Film formation by the vacuum evaporation method can be performed by using a general-purpose vacuum evaporation apparatus.
- the vacuum degree of the vacuum chamber when forming a film by the vacuum evaporation method is reached by a diffusion pump, a turbo molecular pump, a cryopump, etc. that are generally used in consideration of the manufacturing tact time and manufacturing cost of manufacturing the organic electroluminescence device. It is preferably about 1 ⁇ 10 ⁇ 2 to 1 ⁇ 10 ⁇ 5 Pa.
- the deposition rate is preferably 0.005 to 1.0 nm / sec depending on the thickness of the film to be formed.
- 1,3,5-triazine derivative (1) has high solubility in chloroform, dichloromethane, 1,2-dichloroethane, chlorobenzene, toluene, ethyl acetate or tetrahydrofuran, Film formation by an inkjet method, a cast method, a dip method, or the like is also possible.
- the thin film comprising the 1,3,5-triazine derivative [compound (1)] of the present invention has high surface smoothness, amorphousness, heat resistance, electron transport ability, hole blocking ability, redox resistance, water resistance, acid resistance. Since it has a feature, an electron injection characteristic, etc., it is useful as a material of an organic electroluminescent element, and can be used as an electron transport material, a hole blocking material, a light emitting host material and the like. Therefore, the thin film composed of [Compound (1)] can be driven at a low voltage and is useful as a constituent of a long-life organic electroluminescence device.
- the milky white suspension was stirred overnight at room temperature, then slowly heated to 140 ° C. using an oil bath, and the organic solvent (25 mL) and water (5 mL) were distilled off. Chlorobenzene (50 mL ⁇ 2) was added, and the mixture was heated and filtered at 130 ° C. The filtrate was allowed to cool, and methanol (100 mL) was added. The precipitated solid was collected by filtration, washed with methanol (30 mL ⁇ 2), and dried to give 2,4-bis (3-chloro-4′-methylbiphenyl-5-yl) -6-phenyl-1, A white powder of 3,5-triazine (yield 1.94 g, yield 39%) was obtained.
- the milky white suspension was stirred at room temperature for 3 hours and then slowly heated to 140 ° C. using an oil bath to distill off the organic solvent (80 mL) and water (28 mL). Chlorobenzene (100 mL ⁇ 3) was added, and the mixture was filtered while heating at 130 ° C. The filtrate was allowed to cool, and methanol (300 mL) was added. The precipitated solid was collected by filtration, washed with methanol (50 mL ⁇ 2) and then dried to give 4,6-bis (5-chlorobiphenyl-3-yl) -2- (3,5-dibromophenyl)- A white powder of 1,3,5-triazine was obtained (yield 2.21 g, yield 9%).
- phenylboronic acid 904 mg
- 4,6-bis (5-chlorobiphenyl-3-yl) -2- (3,5-dibromophenyl) -1,3,5-triazine (1.70 g)
- Cesium carbonate (2.41 g) and tetrakis (triphenylphosphine) palladium 114 mg
- the low boiling point component was distilled off under reduced pressure, and methanol was added.
- 6-phenylpyridin-3-ylboronic acid (1.29 g), 2,4-bis (5-bromobiphenyl-3-yl) -6-phenyl-1,3,5-triazine (1.55 g)
- Palladium acetate (11.2 mg)
- 1 mol / L tri-tert-butylphosphine toluene solution 150 ⁇ L
- tetrahydrofuran 50 mL
- 4 mol / L aqueous sodium hydroxide solution 4.7 mL
- tetrahydrofuran (3 mL) was cooled to ⁇ 78 ° C., and 1.58 mol / L tert-butyllithium tetrahydrofuran solution (1.18 mL) was added. Subsequently, a tetrahydrofuran solution (2 mL) of 2-bromo-6-phenylpyridine (211 mg) was added dropwise, and the mixture was stirred for 15 minutes while maintaining at -78 ° C. Thereafter, zinc chloride tetramethylethylenediamine complex (530 mg) was added, and the temperature was naturally raised to room temperature.
- Test example-1 Fabrication and performance evaluation of organic electroluminescence device comprising 1,3,5-triazine as a constituent component
- the substrate was cleaned with isopropyl alcohol and then surface treated by ozone ultraviolet cleaning.
- Each layer was vacuum-deposited on the cleaned substrate by a vacuum deposition method to produce an organic electroluminescence device having a light-emitting area of 4 mm 2 as shown in cross-sectional view in FIG.
- the glass substrate was introduced into a vacuum vapor deposition tank and the pressure was reduced to 1.0 ⁇ 10 ⁇ 4 Pa. Thereafter, a hole injection layer 2, a hole transport layer 3, a light emitting layer 4 and an electron transport layer 5 are sequentially formed as an organic compound layer on the glass substrate indicated by 1 in FIG. Filmed.
- a hole injection layer 2 sublimation-purified phthalocyanine copper (II) was vacuum-deposited with a film thickness of 25 nm.
- N, N′-di (naphthylene-1-yl) -N, N′-diphenylbenzidine (NPD) was vacuum-deposited with a film thickness of 45 nm.
- a direct current was applied to the produced organic electroluminescence device, and the light emission characteristics were evaluated using a luminance meter of LUMINANCE METER (BM-9) manufactured by TOPCON.
- V voltage
- cd / m 2 luminance
- cd / A current efficiency
- lm / W power efficiency
- Test Example-4 instead of the electron transport layer 5 of Test Example 3, 2- (2-naphthyl) -4,6-bis [4- (2-pyridyl) -1,1 ′ synthesized in Example 7 of the present invention; 3
- An organic electroluminescent device obtained by vacuum-depositing “, 1” -terphenyl-5′-yl] -1,3,5-triazine with a thickness of 50 nm was prepared in the same manner as in Test Example 3. Measurement of the prepared device The values were 9.7 V, 1588 cd / m 2 , 7.9 cd / A, 2.6 lm / W, and the luminance half time of this device was 133 hours.
- Test example-5 instead of the electron transport layer 5 in Test Example 3, 2,4-bis [5- (2,2′-bipyridin-5-yl) biphenyl-3-yl] -6 synthesized in Example 12 of the present invention was used.
- An organic electroluminescent device obtained by vacuum-depositing phenyl-1,3,5-triazine with a thickness of 50 nm was prepared in the same manner as in Test Example-3.
- the measured values of the fabricated element were 9.1 V, 2070 cd / m 2 , 10.4 cd / A, 3.6 lm / W.
- the luminance half time of this device was 131 hours.
- Test Example-6 instead of the electron transport layer 5 in Test Example 3, 2,4-bis [5- (2,2′-bipyridin-6-yl) biphenyl-3-yl] -6 synthesized in Example 13 of the present invention was used.
- An organic electroluminescent device obtained by vacuum-depositing phenyl-1,3,5-triazine with a thickness of 50 nm was prepared in the same manner as in Test Example-3.
- the measured values of the manufactured element were 8.6 V, 3850 cd / m 2 , 19.3 cd / A, and 7.1 lm / W.
- the luminance half time of this element was 103 hours.
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Abstract
Description
本発明の1,3,5-トリアジン誘導体は、良好な電荷輸送特性を有することから有機電界発光素子の構成成分として有用である。従って、本発明は、さらに、この1,3,5-トリアジン誘導体を有機電界発光素子の有機化合物層の少なくとも一層に用いた、駆動性及び耐久性に優れた有機電界発光素子に関するものである。
本発明の1,3,5-トリアジン誘導体は新規であり、トリアジン環の2,4位にピリジル基を含むクアテルアリーレニル基を有することを特徴とすると共に、6位に芳香族炭化水素基を有することを特徴とする。
本発明の他の目的は、工業的に有利な、上記1,3,5-トリアジン誘導体の製造方法を提供することにある。
本発明のさらに他の目的は、低電圧で駆動することができ、かつ、長寿命の有機電界発光素子を提供することにある。
(式中、R1は水素原子、炭素数1~4のアルキル基又は置換されていてもよいフェニル基を表す。nは1~3の整数を表し、nが2又は3の時、R1は同一又は相異なっていてもよい。Arは置換されていてもよい芳香族炭化水素基を表す。ただし、Arは、1,3,5-トリアジン環に結合する2つの置換クアテルアリーレニル基とは異なる。R3は水素原子、炭素数1~4のアルキル基又はフェニル基を表し、B(OR3)2の2つのR3は同一又は異なっていてもよい。又、2つのR3は一体となって酸素原子及びホウ素原子を含んで環を形成することもできる。)で示される化合物と、下記一般式(5)
2.正孔注入層
3.正孔輸送層
4.発光層
5.電子輸送層
6.陰極層
一般式(1)において、R1は、水素原子、炭素数1~4のアルキル基又は置換されていてもよいフェニル基を表す。水素原子は、有機電界発光素子用材料としての性能がよい点で好ましい。
一般式(1)において、R1で表される炭素数1~4のアルキル基の具体例としては、メチル基、エチル基、プロピル基、2-プロピル基、ブチル基、tert-ブチル基等を挙げることができ、合成容易であり有機電界発光素子用材料としての性能がよい点で、メチル基が好ましい。
X1で表される脱離基は、塩素原子、臭素原子又はヨウ素原子を表す。収率がよい点で、臭素原子又は塩素原子が好ましい。
上記一般式(3)で示される化合物(以下、「化合物(3)」ということがある)は、例えば、J.Tsuji著、「Palladium Reagents and Catalysts」,John Wiley & Sons,2004年、Journal of Organic Chemistry,60巻,7508-7510,1995年、Journal of Organic Chemistry,65巻,164-168,2000年、Organic Letters,10巻,941-944,2008年、又はChemistry of Materials,20巻,5951-5953,2008年に開示されている方法を用いて製造することができる。化合物(3)の好ましい例として、次の3-1~3-37(式中、Mは、金属基又はヘテロ原子基を表す。)を例示することができるが、本発明はこれに限定されるものではない。
「工程1」の反応は溶媒中で実施することができる。「工程1」で用いることのできる溶媒として、水、ジメチルスルホキシド、ジメチルホルムアミド、テトラヒドロフラン、トルエン、ベンゼン、ジエチルエーテル又はキシレン等を例示することができ、これらを適宜組み合わせて用いてもよい。収率がよい点でテトラヒドロフランを用いることが好ましい。
また、本発明の1,3,5-トリアジン誘導体〔化合物(1)〕は、次の反応式
X2で表される脱離基は、塩素原子、臭素原子又はヨウ素原子を表す。収率がよい点で、臭素原子が好ましい。
上記一般式(5)で示される化合物(以下、「化合物(5)」ということがある)は、例えば、Synlett,6巻,852-854,2003年に開示されている方法を用いて製造することができる。化合物(5)の好ましい例として、次の「5-1」~「5-37」(式中、X2は脱離基を表す。)を例示することができるが、本発明はこれに限定されるものではない。
「工程2」で用いることのできるパラジウム触媒としては、「工程1」で例示したパラジウム塩及び錯化合物を例示することができる。中でも、第三級ホスフィンを配位子として有するパラジウム錯体は収率がよい点で好ましく、入手容易であり、収率がよい点で、トリフェニルホスフィンを配位子として有するパラジウム錯体が特に好ましい。「工程2」で用いるパラジウム触媒の量は、いわゆる触媒量であれば特に制限はないが、収率がよい点で、パラジウム触媒と化合物(4)とのモル比は、1:50~1:10が好ましい。
化合物(1)は、「工程2」の終了後に通常の処理をすることで得られる。必要に応じて、再結晶、カラムクロマトグラフィー又は昇華等で精製してもよい。
「工程3」で用いるボラン化合物(6)又はジボロン化合物(7)と化合物(2)とのモル比に特に制限はないが、1:1~5:1が好ましく、収率がよい点で2:1~3:1がさらに好ましい。
本工程で得られた化合物(4)は、反応後単離してもよいが、単離せずに「工程2」に供してもよい。
13C-NMR(CDCl3):δ125.9(CH×2),127.3(CH×4),127.6(CH×2),128.3(CH×2),128.8(CH×2),129.1(CH×4),129.2(CH×2),131.3(CH×2),133.0(CH),135.3(quart.×2),135.7(quart.),138.1(quart.×2),139.4(quart.×2),143.4(quart.×2),170.7(quart.×2),172.0(quart.).
13C-NMR(CDCl3):δ21.3(CH3×2),125.6(CH×2),127.1(CH×4),127.3(CH×2),128.8(CH×2),129.1(CH×2),129.8(CH×4),131.0(CH×2),133.0(CH),135.3(quart.×2),135.6(quart.),136.6(quart.×2),138.2(quart.×2),138.3(quart.×2),143.4(quart.×2),170.8(quart.×2),172.0(quart.).
得られた黄色固体を0℃に冷却した28%アンモニア水溶液(300mL)に徐々に加えると白色固体が生成した。室温で1時間攪拌し、ろ過後、得られた白色固体を水、メタノールで洗浄した。白色固体を乾燥後、クロロホルム(80mL)を加え、加熱ろ過した。ろ液のクロロホルムを減圧下留去し、得られた固体をジクロロメタン-メタノールで再結晶し、2,4-ビス(5-クロロビフェニル-3-イル)-6-p-トリル-1,3,5-トリアジンの白色固体(収量2.81g、収率15%)を得た。
13C-NMR(CDCl3):δ21.8(CH3),125.3(CH×2),127.3(CH×4),127.6(CH×2),128.2(CH×2),129.0(CH×4),129.1(CH×2),129.5(CH×2),131.1(CH×2),133.0(quart.),135.3(quart.×2),138.3(quart.×2),139.5(quart.×2),143.5(quart.×2),143.7(quart.),170.7(quart.×2),172.1(quart.).
得られた黄色固体を0℃に冷却した28%アンモニア水溶液(300mL)に徐々に加えると白色固体が生成した。室温で1時間攪拌し、ろ過後、得られた白色固体を水、メタノールで洗浄した。白色固体を乾燥後、クロロホルム(300mL)を加え、加熱ろ過した。さらに、ろ別した不溶成分にクロロホルム(100mL)を加え、再度、加熱ろ過した。全てのろ液を集め、クロロホルムを減圧下留去し、得られた固体をキシレンで再結晶し、2,4-ビス(5-クロロビフェニル-3-イル)-6-(2-ナフチル)-1,3,5-トリアジンの白色固体(収量7.80g、収率36%)を得た。
13C-NMR(CDCl3):δ125.0(CH),125.9(CH×2),126.6(CH),127.3(CH×4),127.6(CH×2),127.9(CH),128.2(CH),128.3(CH×2),128.6(CH),129.1(CH×4),129.7(CH),130.3(CH),131.3(CH×2),132.9(quart.),133.1(quart.),135.4(quart.×2),135.9(quart.),138.3(quart.×2),139.5(quart.×2),144.5(quart.×2),170.9(quart.×2),172.1(quart.).
13C-NMR(CDCl3):δ120.6(CH×2),122.3(CH×2),126.6(CH×2),126.9(CH×2),127.6(CH×4),127.7(CH×4),127.78(CH×4),127.81(CH×2),128.7(CH×2),129.0(CH×4),129.1(CH×2),130.1(CH×2),132.7(CH),136.0(quart.×2),136.9(CH×2),137.4(quart.×2),138.8(quart.×2),140.8(quart.×2),141.2(quart.),141.4(quart.×2),142.4(quart.×2),149.8(CH×2),157.0(quart.×2),171.76(quart.×2),171.84(quart.).
13C-NMR(CDCl3):δ121.5(CH×4),126.5(CH×2),127.1(CH×2),127.4(CH×4),127.6(CH×4),127.9(CH×2),128.1(CH×4),128.7(CH×2),129.0(CH×4),129.1(CH×2),130.0(CH×2),132.8(CH),136.1(quart.),137.5(quart.×2),137.6(quart.×2),140.7(quart.×2),141.4(quart.×2),141.6(quart.×2),142.6(quart.×2),147.8(quart.×2),150.4(CH×4),171.8(quart.×2),171.9(quart.).
13C-NMR(CDCl3):δ21.3(CH3×2),120.6(CH×2),122.2(CH×2),126.4(CH×2),126.8(CH×2),127.3(CH×4),127.5(CH×4),127.8(CH×4),128.7(CH×2),129.1(CH×2),129.7(CH×4),130.0(CH×2),132.7(CH),136.1(quart.×2),136.8(CH×2),137.4(quart.×2),137.6(quart.×2),137.9(quart.×2),138.7(quart.),141.7(quart.×2),141.8(quart.×2),142.8(quart.×2),149.8(CH×2),157.0(quart.×2),171.82(quart.×2),171.84(quart.).
13C-NMR(CDCl3):δ21.8(CH3),120.5(CH×2),122.2(CH×2),126.6(CH×2),126.9(CH×2),127.45(CH×4),127.47(CH×4),127.7(CH×4),127.8(CH×2),129.0(CH×4),129.1(CH×2),129.5(CH×2),130.0(CH×2),133.5(quart.),136.8(CH×2),137.6(quart.×2),138.8(quart.×2),140.9(quart.×2),141.4(quart.×2),141.7(quart.×2),142.4(quart.×2),143.4(quart.),149.8(CH×2),157.1(quart.×2),171.7(quart.×2),171.9(quart.).
13C-NMR(CDCl3):δ120.5(CH×2),122.2(CH×2),125.2(CH),126.4(CH),126.6(CH×2),126.9(CH×2),127.5(CH×8),127.7(CH×4),127.77(CH×2),127.84(CH),127.9(CH),128.4(CH),129.0(CH×4),129.7(CH),130.0(CH×2),130.2(CH),133.1(quart.),133.5(quart.),135.8(quart.),136.8(CH×2),137.4(quart.×2),138.8(quart.×2),140.8(quart.×2),141.3(quart.×2),141.6(quart.×2),142.4(quart.×2),149.8(CH×2),157.0(quart.×2),171.7(quart.×2),171.9(quart.).
13C-NMR(CDCl3):δ124.0,125.8,126.6,126.7,127.1,127.5,128.0,128.8,129.1,129.2,129.9,130.4,132.8,135.2,136.9,137.5,138.4,140.6,141.9,141.9,142.5,147.9,148.2,171.7,171.9.
1,3,5-トリアジンを構成成分とする有機電界発光素子の作製と性能評価
基板には、2mm幅の酸化インジウム-スズ(ITO)膜がストライプ状にパターンされたITO透明電極付きガラス基板を用いた。この基板をイソプロピルアルコールで洗浄した後、オゾン紫外線洗浄にて表面処理を行った。洗浄後の基板に、真空蒸着法で各層の真空蒸着を行い、断面図を図1に示すような発光面積4mm2有機電界発光素子を作製した。
作製した素子の測定値は、5.5V、2240cd/m2、11.2cd/A、6.3lm/Wであった。また、この素子の輝度半減時間は、178時間であった。
試験例-1の発光層4に代えて、Alqを40nmの膜厚で真空蒸着した有機電界発光素子を試験例-1と同様に作製した。作製した素子の測定値は、4.6V、953cd/m2、4.8cd/A、3.2lm/Wであった。また、この素子の輝度半減時間は、3510時間であった。
試験例-3
作製した素子の測定値は、10.1V、2690cd/m2、13.5cd/A、4.2lm/Wであった。また、この素子の輝度半減時間は、105時間であった。
試験例-3の電子輸送層5に代えて、本発明の実施例7で合成した2-(2-ナフチル)-4,6-ビス[4-(2-ピリジル)-1,1’;3’,1”-ターフェニル-5’-イル]-1,3,5-トリアジンを50nmの膜厚で真空蒸着した有機電界発光素子を試験例-3と同様に作製した。作製した素子の測定値は、9.7V、1588cd/m2、7.9cd/A、2.6lm/Wであった。また、この素子の輝度半減時間は、133時間であった。
試験例-3の電子輸送層5に代えて、本発明の実施例12で合成した2,4-ビス[5-(2,2’-ビピリジン-5-イル)ビフェニル-3-イル]-6-フェニル-1,3,5-トリアジンを50nmの膜厚で真空蒸着した有機電界発光素子を試験例-3と同様に作製した。作製した素子の測定値は、9.1V、2070cd/m2、10.4cd/A、3.6lm/Wであった。また、この素子の輝度半減時間は、131時間であった。
試験例-3の電子輸送層5に代えて、本発明の実施例13で合成した2,4-ビス[5-(2,2’-ビピリジン-6-イル)ビフェニル-3-イル]-6-フェニル-1,3,5-トリアジンを50nmの膜厚で真空蒸着した有機電界発光素子を試験例-3と同様に作製した。作製した素子の測定値は、8.6V、3850cd/m2、19.3cd/A、7.1lm/Wであった。また、この素子の輝度半減時間は、103時間であった。
試験例-1の電子輸送層5に代えて、汎用電子輸送材料であるAlqを20nmの膜厚で真空蒸着した有機電界発光素子を試験例-1と同様に作製した。作製した素子の測定値は、6.8V、1939cd/m2、9.7cd/A、4.5lm/Wであった。また、この素子の輝度半減時間は、163時間であった。
試験例-2の電子輸送層5に代えて、汎用電子輸送材料であるAlqを20nmの膜厚で真空蒸着した有機電界発光素子を試験例-2と同様に作製した。作製した素子の測定値は、5.4V、917cd/m2、4.6cd/A、2.7lm/Wであった。また、この素子の輝度半減時間は、1680時間であった。
試験例-3の電子輸送層5に代えて、汎用電子輸送材料であるAlqを50nmの膜厚で真空蒸着した有機電界発光素子を試験例-3と同様に作製した。作製した素子の測定値は、10.4V、3450cd/m2、17.3cd/A、5.2lm/Wであった。また、この素子の輝度半減時間は、108時間であった。
Claims (10)
- R1が水素原子、メチル基又はフェニル基であることを特徴とする請求項1に記載の1,3,5-トリアジン誘導体。
- Arが置換されていてもよいフェニル基又は置換されていてもよいナフチル基であることを特徴とする請求項1又は2に記載の1,3,5-トリアジン誘導体。
- Arが無置換、メチル置換、フェニル置換若しくはフェニル二置換のフェニル基、又はナフチル基であることを特徴とする請求項1~3のいずれかに記載の1,3,5-トリアジン誘導体。
- 下記一般式(2)
(式中、R1は水素原子、炭素数1~4のアルキル基又は置換されていてもよいフェニル基を表す。nは1~3の整数を表し、nが2又は3の時、R1は同一又は相異なっていてもよい。Arは置換されていてもよい芳香族炭化水素基を表す。ただし、Arは、1,3,5-トリアジン環に結合する2つの置換クアテルアリーレニル基とは異なる。X1は脱離基を表す。)で示される化合物と、下記一般式(3)
(式中、V及びYは、各々窒素原子又は炭素原子を表す。但し、V及びYは同時に炭素原子とはなり得ない。Mは、金属基又はヘテロ原子基を表す。)で示される化合物とを、場合によっては塩基の存在下に、パラジウム触媒の存在下にカップリング反応させることを特徴とする、下記一般式(1)
(式中、R1、n、Ar、V及びYは、上記一般式(2)、(3)における定義と同じである。)で示される1,3,5-トリアジン誘導体の製造方法。 - Mで表される金属基がZnR2で示される基(但し、R2は、ハロゲン原子を表す。)であり、また、Mで表されるヘテロ原子基がB(OR3)2(但し、R3は水素原子、炭素数1から4のアルキル基又はフェニル基を表し、B(OR3)2の2つのR3は同一又は異なっていてもよい。又、2つのR3は一体となって酸素原子及びホウ素原子を含んで環を形成することもできる。)で示される基であることを特徴とする請求項5に記載の製造方法。
- 下記一般式(4)
(式中、R1は水素原子、炭素数1~4のアルキル基又は置換されていてもよいフェニル基を表す。nは1~3の整数を表し、nが2又は3の時、R1は同一又は相異なっていてもよい。Arは置換されていてもよい芳香族炭化水素基を表す。ただし、Arは、1,3,5-トリアジン環に結合する2つの置換クアテルアリーレニル基とは異なる。R3は水素原子、炭素数1~4のアルキル基又はフェニル基を表し、B(OR3)2の2つのR3は同一又は異なっていてもよい。又、2つのR3は一体となって酸素原子及びホウ素原子を含んで環を形成することもできる。)で示される化合物と、下記一般式(5)
(式中、V及びYは、各々窒素原子又は炭素原子を表す。但し、V及びYは同時に炭素原子とはなり得ない。X2は脱離基を表す。)で示される化合物とを、塩基及びパラジウム触媒の存在下にカップリング反応させることを特徴とする、下記一般式(1)
(式中、R1、n、Ar、V及びYは、上記一般式(4)、(5)における定義と同様である。)で示される1,3,5-トリアジン誘導体の製造方法。 - パラジウム触媒が、第三級ホスフィンを配位子として有するパラジウム錯体であることを特徴とする請求項5~7のいずれかに記載の1,3,5-トリアジン誘導体の製造方法。
- 第三級ホスフィンが、2-ジシクロヘキシルホスフィノ-2’,4’,6’-トリイソプロピルビフェニルであることを特徴とする請求項8に記載の1,3,5-トリアジン誘導体の製造方法。
- 下記一般式(1)
(式中、R1は水素原子、炭素数1~4のアルキル基又は置換されていてもよいフェニル基を表す。nは1~3の整数を表し、nが2又は3の時、R1は同一又は相異なっていてもよい。Arは置換されていてもよい芳香族炭化水素基を表す。ただし、Arは、1,3,5-トリアジン環に結合する2つの置換クアテルアリーレニル基とは異なる。V及びYは、各々窒素原子又は炭素原子を表す。但し、V及びYは同時に炭素原子とはなり得ない。)で示される1,3,5-トリアジン誘導体を構成成分とする有機電界発光素子。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09830393.6A EP2361909B1 (en) | 2008-12-01 | 2009-12-01 | 1,3,5-triazine derivative, process for producing same, and organic electroluminescent element comprising same |
| KR1020117014920A KR101775166B1 (ko) | 2008-12-01 | 2009-12-01 | 1,3,5―트라이아진 유도체와, 그의 제조방법 및 해당 유도체를 포함하는 유기 전계발광소자 |
| CN2009801558807A CN102300859B (zh) | 2008-12-01 | 2009-12-01 | 1,3,5-三嗪衍生物及其制备方法和以其为构成成分的有机电致发光器件 |
| US13/131,972 US8674091B2 (en) | 2008-12-01 | 2009-12-01 | 1,3,5-triazine derivative, process for producing same, and organic electroluminescent element comprising same as constituent |
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| JP2008306303 | 2008-12-01 | ||
| JP2008-306303 | 2008-12-01 |
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| PCT/JP2009/070170 Ceased WO2010064627A1 (ja) | 2008-12-01 | 2009-12-01 | 1,3,5-トリアジン誘導体とその製造方法、及びそれらを構成成分とする有機電界発光素子 |
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| US (1) | US8674091B2 (ja) |
| EP (1) | EP2361909B1 (ja) |
| JP (1) | JP5761907B2 (ja) |
| KR (1) | KR101775166B1 (ja) |
| CN (1) | CN102300859B (ja) |
| TW (1) | TWI475011B (ja) |
| WO (1) | WO2010064627A1 (ja) |
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| WO2012087960A1 (en) * | 2010-12-20 | 2012-06-28 | E. I. Du Pont De Nemours And Company | Triazine derivatives for electronic applications |
| US8617720B2 (en) | 2009-12-21 | 2013-12-31 | E I Du Pont De Nemours And Company | Electroactive composition and electronic device made with the composition |
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| JP2012036388A (ja) * | 2010-07-16 | 2012-02-23 | Sumitomo Chemical Co Ltd | 高分子化合物及び該高分子化合物を含有する組成物 |
| WO2012087960A1 (en) * | 2010-12-20 | 2012-06-28 | E. I. Du Pont De Nemours And Company | Triazine derivatives for electronic applications |
| JP2014507401A (ja) * | 2010-12-20 | 2014-03-27 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 電子技術応用のためのトリアジン誘導体 |
| US9252368B2 (en) | 2011-11-11 | 2016-02-02 | Tosoh Corporation | Cyclic azine compound having nitrogen-containing condensed aromatic group, method for producing same, and organic electroluminescent device comprising same as constituent component |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201026671A (en) | 2010-07-16 |
| CN102300859B (zh) | 2013-12-18 |
| KR101775166B1 (ko) | 2017-09-05 |
| US8674091B2 (en) | 2014-03-18 |
| JP2010155826A (ja) | 2010-07-15 |
| JP5761907B2 (ja) | 2015-08-12 |
| EP2361909B1 (en) | 2014-09-10 |
| EP2361909A1 (en) | 2011-08-31 |
| CN102300859A (zh) | 2011-12-28 |
| TWI475011B (zh) | 2015-03-01 |
| KR20110106325A (ko) | 2011-09-28 |
| EP2361909A4 (en) | 2011-10-19 |
| US20110288295A1 (en) | 2011-11-24 |
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