CN114436754B - 一种有机化合物及其应用 - Google Patents
一种有机化合物及其应用 Download PDFInfo
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- CN114436754B CN114436754B CN202210107870.3A CN202210107870A CN114436754B CN 114436754 B CN114436754 B CN 114436754B CN 202210107870 A CN202210107870 A CN 202210107870A CN 114436754 B CN114436754 B CN 114436754B
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- unsubstituted
- substituted
- organic compound
- branched alkyl
- heteroaryl
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- 150000002894 organic compounds Chemical class 0.000 title claims abstract description 90
- 239000000463 material Substances 0.000 claims abstract description 53
- 230000000903 blocking effect Effects 0.000 claims abstract description 11
- 125000000217 alkyl group Chemical group 0.000 claims description 31
- 125000003118 aryl group Chemical group 0.000 claims description 24
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 24
- 150000001875 compounds Chemical class 0.000 claims description 22
- -1 diphenylamino Chemical group 0.000 claims description 22
- 125000001072 heteroaryl group Chemical group 0.000 claims description 21
- 239000010409 thin film Substances 0.000 claims description 20
- 229910052736 halogen Inorganic materials 0.000 claims description 17
- 150000002367 halogens Chemical class 0.000 claims description 17
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 15
- 125000001424 substituent group Chemical group 0.000 claims description 14
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 10
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 9
- 125000004076 pyridyl group Chemical group 0.000 claims description 9
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 7
- 125000001624 naphthyl group Chemical group 0.000 claims description 7
- 235000010290 biphenyl Nutrition 0.000 claims description 5
- 239000004305 biphenyl Substances 0.000 claims description 5
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 125000003373 pyrazinyl group Chemical group 0.000 claims description 5
- 125000000714 pyrimidinyl group Chemical group 0.000 claims description 5
- 125000002183 isoquinolinyl group Chemical group C1(=NC=CC2=CC=CC=C12)* 0.000 claims description 3
- 125000002294 quinazolinyl group Chemical group N1=C(N=CC2=CC=CC=C12)* 0.000 claims description 3
- 125000002943 quinolinyl group Chemical group N1=C(C=CC2=CC=CC=C12)* 0.000 claims description 3
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 claims description 3
- 125000005842 heteroatom Chemical group 0.000 claims description 2
- 125000003107 substituted aryl group Chemical group 0.000 claims description 2
- 125000000027 (C1-C10) alkoxy group Chemical group 0.000 claims 6
- 125000006736 (C6-C20) aryl group Chemical group 0.000 claims 5
- 125000006835 (C6-C20) arylene group Chemical group 0.000 claims 1
- 238000004770 highest occupied molecular orbital Methods 0.000 abstract description 13
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 abstract description 13
- 238000013461 design Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 230000009477 glass transition Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 87
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- 238000000034 method Methods 0.000 description 16
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- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 8
- 125000003545 alkoxy group Chemical group 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
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- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
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- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
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- ZOKIJILZFXPFTO-UHFFFAOYSA-N 4-methyl-n-[4-[1-[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]cyclohexyl]phenyl]-n-(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C1(CCCCC1)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 ZOKIJILZFXPFTO-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 2
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- CUJRVFIICFDLGR-UHFFFAOYSA-N acetylacetonate Chemical compound CC(=O)[CH-]C(C)=O CUJRVFIICFDLGR-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
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- 125000004391 aryl sulfonyl group Chemical group 0.000 description 2
- 125000003785 benzimidazolyl group Chemical group N1=C(NC2=C1C=CC=C2)* 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
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- 229910052738 indium Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
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- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
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- 238000004057 DFT-B3LYP calculation Methods 0.000 description 1
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- 241000720974 Protium Species 0.000 description 1
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- 125000001935 tetracenyl group Chemical group C1(=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C12)* 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 125000000335 thiazolyl group Chemical group 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 238000004809 thin layer chromatography Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 125000004306 triazinyl group Chemical group 0.000 description 1
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 description 1
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Substances C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052722 tritium Inorganic materials 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
- C07D213/16—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom containing only one pyridine ring
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- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6572—Polycyclic condensed heteroaromatic hydrocarbons comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
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- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
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- C07C255/50—Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton to carbon atoms of non-condensed six-membered aromatic rings
- C07C255/51—Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton to carbon atoms of non-condensed six-membered aromatic rings containing at least two cyano groups bound to the carbon skeleton
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- C07C49/587—Unsaturated compounds containing a keto groups being part of a ring
- C07C49/657—Unsaturated compounds containing a keto groups being part of a ring containing six-membered aromatic rings
- C07C49/665—Unsaturated compounds containing a keto groups being part of a ring containing six-membered aromatic rings a keto group being part of a condensed ring system
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- C07D209/80—[b, c]- or [b, d]-condensed
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- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
- C07D213/22—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom containing two or more pyridine rings directly linked together, e.g. bipyridyl
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- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D213/54—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D213/57—Nitriles
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- C07D215/04—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to the ring carbon atoms
- C07D215/06—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to the ring carbon atoms having only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, attached to the ring nitrogen atom
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- C07D237/26—Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings condensed with carbocyclic rings or ring systems
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- C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D239/26—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
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- C07D251/14—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with hydrogen or carbon atoms directly attached to at least one ring carbon atom
- C07D251/24—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with hydrogen or carbon atoms directly attached to at least one ring carbon atom to three ring carbon atoms
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- C07D277/62—Benzothiazoles
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Abstract
本发明提供一种有机化合物及其应用,所述有机化合物具有如式I所示结构,通过分子结构的设计,使其具有适宜的HOMO和LUMO能级,单线态能级较高,光电性能优异,且具有较高的玻璃化转变温度和热稳定性,容易形成良好的无定形薄膜,适于OLED器件的加工和应用。所述有机化合物用于OLED器件,可作为发光层材料、电子传输材料或空穴阻挡材料,尤其适用于发光层主体材料,能够有效提高器件发光效率,改善器件的稳定性、提升寿命,并降低工作电压和能耗,使OLED器件在发光效率、寿命和能耗等综合性能方面获得显著提高。
Description
技术领域
本发明属于有机电致发光材料技术领域,具体涉及一种有机化合物及其应用。
背景技术
与传统的无机电致发光技术相比,有机电致发光(organicelectroluminescence,OLE)技术作为新一代显示技术,具有超薄、自发光、视角宽、响应快、发光效率高、温度适应性好、生产工艺简单、驱动电压低、能耗低等优点,已被广泛应用于平板显示、柔性显示、固态照明和车载显示等行业。
有机电致发光技术的核心在于有机电致发光材料,有机电致发光材料按照发光机理可分为电致荧光和电致磷光两种,电致荧光是单重态激子的辐射衰减跃迁,电致磷光则是三重态激子辐射衰减到基态所发射的光。根据自旋量子统计理论,单重态激子和三重态激子的形成概率比例是1:3。电致荧光材料的内量子效率不超过25%,外量子效率普遍低于5%;电致磷光材料的内量子效率理论上达到100%,外量子效率可达20%。1998年,吉林大学的马於光教授和美国普林斯顿大学的Forrest教授分别报道了采用锇配合物和铂配合物作为染料掺杂入发光层,第一次成功得到并解释了磷光电致发光现象,并开创性地将所制备磷光材料应用于有机电致发光器件(OLED器件)。
由于磷光重金属材料有较长的寿命,可达到μs级别,在高电流密度下,可能导致三线态-三线态湮灭和浓度淬灭,造成器件性能衰减,因此通常将重金属磷光材料掺杂到合适的主体材料中,形成一种主客体掺杂体系,使得能量传递最优化,发光效率和寿命最大化。在目前的研究现状中,重金属掺杂材料商业化已成熟,很难开发可替代的掺杂材料。因此,把重心放在研发高性能主体材料是研究者们共通的思路。
随着显示技术的不断发展,人们对OLED器件的光电性质提出了更高的要求,但是,目前使用的主体材料在发光性能、稳定性、工作寿命、加工性等方面还存在很多不足之处,难以满足高性能OLED器件的性能要求。因此,开发更多种类、更高性能的有机电致发光材料,是本领域亟待解决的问题。
发明内容
为了开发更多种类、更高性能的有机电致发光材料,本发明的目的之一在于提供一种有机化合物,所述有机化合物具有如式I所示结构:
式I中,L选自单键、取代或未取代的C6-C30亚芳基、取代或未取代的C3-C30亚杂芳基中的任意一种。
式I中,A选自取代或未取代的C6-C30芳基、取代或未取代的C3-C30杂芳基、取代或未取代的C6-C30芳基酮基、取代或未取代的C6-C30芳基砜基、取代或未取代的C6-C30芳基硼基中的任意一种。
式I中,R1、R2、R3、R4各自独立地选自卤素、氰基、取代或未取代的C1-C30直链或支链烷基、取代或未取代的C3-C30环烷基、取代或未取代的C1-C30烷氧基、取代或未取代的C6-C30芳基、取代或未取代的C3-C30杂芳基、取代或未取代的C6-C30芳胺基中的任意一种。
式I中,n1、n2、n3各自独立地选自0-4的整数,例如可以为0、1、2、3或4。
式I中,n4选自0-6的整数,例如可以为0、1、2、3、4、5或6。
本发明提供的有机化合物具有式I所示结构,通过分子结构的特殊设计,使所述有机化合物具有适宜的HOMO和LUMO能级,单线态能级较高,光电性能优异,而且具有较高的玻璃化转变温度和热稳定性,容易形成良好的无定形薄膜,适于OLED器件的加工和使用。所述有机化合物用于OLED器件,可作为发光层材料、电子传输材料或空穴阻挡材料,尤其适于作为发光层的主体材料,能够与相邻层材料的能级相匹配,有效地传输电子,将空穴和激子限制在发光区,利于扩宽发光区域,提升器件发光效率和寿命,降低器件的电压和能耗。
本发明中,所述卤素均可以为F、Cl、Br或I。
本发明中,所述C6-C30均可以为C6、C8、C9、C10、C12、C13、C14、C15、C16、C18、C20、C22、C24、C26或C28等。
本发明中,所述C3-C30均可以为C3、C4、C5、C6、C8、C9、C10、C12、C13、C14、C15、C16、C18、C20、C22、C24、C26或C28等。
本发明中,所述C1-C30均可以为C1、C2、C3、C4、C5、C6、C8、C9、C10、C12、C13、C14、C15、C16、C18、C20、C22、C24、C26或C28等。
本发明的目的之二在于提供一种OLED器件,所述OLED器件包括阳极、阴极以及设置于所述阳极和阴极之间的有机薄膜层,所述有机薄膜层包括至少一种如目的之一所述的有机化合物。
本发明的目的之三在于提供一种显示面板,所述显示面板包括如目的之二所述的OLED器件。
本发明的目的之四在于提供一种电子设备,所述电子设备包括如目的之二所述的OLED器件或如目的之三所述的显示面板中的至少一种。
相对于现有技术,本发明具有以下有益效果:
本发明提供的有机化合物具有式I所示的结构,通过分子结构的设计,使其具有适宜的HOMO和LUMO能级,单线态能级较高,光电性能优异,且具有较高的玻璃化转变温度和热稳定性,容易形成良好的无定形薄膜,适于OLED器件的加工和应用。所述有机化合物用于OLED器件,可作为发光层材料、电子传输材料或空穴阻挡材料,尤其适用于发光层主体材料,能够有效提高器件发光效率,改善器件的稳定性、提升寿命,并降低工作电压和能耗,使OLED器件在发光效率、寿命和能耗等综合性能方面获得显著提高。
附图说明
图1为本发明一个实施方式中提供的OLED器件的结构示意图;
图2为本发明另一实施方式中提供的OLED器件的结构示意图;
其中,110-阳极,120-第一有机薄膜层,121-第一空穴传输层,122-第二空穴传输层,130-发光层,140-第二有机薄膜层,141-第一电子传输层,142-第二电子传输层,150-阴极,160-基板,170-盖帽层。
具体实施方式
下面通过具体实施方式来进一步说明本发明的技术方案。本领域技术人员应该明了,所述实施例仅仅是帮助理解本发明,不应视为对本发明的具体限制。
在一个实施方式中,本发明提供一种有机化合物,所述有机化合物具有如式I所示结构:
式I中,L选自单键、取代或未取代的C6-C30亚芳基、取代或未取代的C3-C30亚杂芳基中的任意一种;当L为单键时,代表基团A与骨架结构通过单键直接相连。
式I中,A选自取代或未取代的C6-C30芳基、取代或未取代的C3-C30杂芳基、取代或未取代的C6-C30芳基酮基、取代或未取代的C6-C30芳基砜基、取代或未取代的C6-C30芳基硼基中的任意一种。
式I中,R1、R2、R3、R4各自独立地选自卤素、氰基、取代或未取代的C1-C30直链或支链烷基、取代或未取代的C3-C30环烷基、取代或未取代的C1-C30烷氧基、取代或未取代的C6-C30芳基、取代或未取代的C3-C30杂芳基、取代或未取代的C6-C30芳胺基中的任意一种。
式I中,n1、n2、n3各自独立地选自0-4的整数,例如可以为0、1、2、3或4。
式I中,n4选自0-6的整数,例如可以为0、1、2、3、4、5或6。
本发明提供的有机化合物具有式I所示结构,其以含螺大环结构作为中心骨架,搭配基团A(所述A与中心骨架通过作为Linker的L连接),并与可选地R1、R2、R3、R4进行复配,使所述有机化合物的具有适宜的HOMO和LUMO能级,单线态能级较高(ES>2.75eV),光电性能优异。所述有机化合物用于OLED器件,可作为发光层材料、电子传输材料或空穴阻挡材料,尤其适用于发光层的主体材料,能够与相邻层材料的能级相匹配,有效地传输电子,将空穴和激子限制在发光区,利于扩宽发光区域,使OLED器件的发光效率更高,工作寿命显著延长,工作电压和能耗降低。
具体而言,所述有机化合物通过分子结构的设计,其LUMO能级较深,有利于电子的顺利注入,从而降低器件的工作电压;同时其具有合适的HOMO能级,能够阻挡空穴,将空穴限制在发光区与电子进行复合,有利于扩宽发光复合区域,提升器件发光效率;而且,所述有机化合物具有良好的热稳定性和成膜性,容易形成良好的无定形薄膜,有利于提高器件的稳定性,进而延长器件寿命。
本发明中,所述卤素均可以为F、Cl、Br或I。
本发明中,Ca-Cb的表达方式代表该基团具有的碳原子数为a-b,若无特殊说明,该碳原子数不包括取代基的碳原子数。
本发明中,所述C6-C30均可以为C6、C8、C9、C10、C12、C13、C14、C15、C16、C18、C20、C22、C24、C26或C28等。
本发明中,对于化学元素的表述包含化学性质相同的同位素的概念,例如,氢(H)则包括1H(氕)、2H(氘,D)、3H(氚,T)等;碳(C)则包括12C、13C等。
本发明中,所述C3-C30均可以为C3、C4、C5、C6、C8、C9、C10、C12、C13、C14、C15、C16、C18、C20、C22、C24、C26或C28等。
本发明中,所述C1-C30均可以为C1、C2、C3、C4、C5、C6、C8、C9、C10、C12、C13、C14、C15、C16、C18、C20、C22、C24、C26或C28等。
具体地,所述C6-C30芳基可以为C6、C8、C9、C10、C12、C13、C14、C15、C16、C18、C20、C22、C24、C26或C28等的芳基;示例性地包括但不限于:苯基、联苯基、三联苯基、萘基、蒽基、菲基、茚基、芴基及其衍生物(9,9-二甲基芴基、9,9-二乙基芴基、9,9-二苯基芴基、9,9-二萘基芴基、螺二芴基、苯并芴基等)、荧蒽基、三亚苯基、芘基、苝基、基或并四苯基等。
所述C3-C30杂芳基可以为C3、C4、C5、C6、C8、C9、C10、C12、C13、C14、C15、C16、C18、C20、C22、C24、C26或C28等的杂芳基,其中的杂原子包括O、S、N、P或B等;示例性地包括但不限于:呋喃基、噻吩基、吡咯基、吡啶基、吡嗪基、哒嗪基、嘧啶基、三嗪基、喹啉基、异喹啉基、喹唑啉基、喹喔啉基、噌啉基、邻菲罗啉基、咪唑基、噻唑基、恶唑基、苯并咪唑基、苯并噻唑基、苯并恶唑基、苯并呋喃基、苯并噻吩基、吲哚基、二苯并呋喃基、二苯并噻吩基、咔唑基及其衍生物(N-苯基咔唑基、N-萘基咔唑基、苯并咔唑基、二苯并咔唑基、吲哚并咔唑基、氮杂咔唑基等)等。
本发明所述C6-C30(例如C6、C9、C10、C12、C14、C16、C18、C20、C22、C24、C26或C28等)亚芳基的具体示例,可以为上述芳基中去掉一个氢原子而得到的二价基团;所述C3-C30(例如C3、C4、C5、C6、C9、C10、C12、C14、C16、C18、C20、C22、C24、C26或C28等)亚杂芳基的具体示例,可以为上述杂芳基中去掉一个氢原子而得到的二价基团。
本发明中,所述C6-C30(例如C6、C9、C10、C12、C14、C16、C18、C20、C22、C24、C26或C28等)芳基酮基的具体示例,为与上述列举的芳基相连形成的一价基团;所述C6-C30(例如C6、C9、C10、C12、C14、C16、C18、C20、C22、C24、C26或C28等)芳基砜基的具体示例,为/>与上述列举的芳基相连形成的一价基团;虚线代表基团的连接位点。
本发明中,所述C6-C30(例如C6、C9、C10、C12、C14、C16、C18、C20、C22、C24、C26或C28等)芳基硼基的具体示例,为-BH3中的至少一个H被上述列举的芳基取代而形成的一价基团;所述C6-C30(例如C6、C9、C10、C12、C14、C16、C18、C20、C22、C24、C26或C28等)芳胺基的具体示例,为-NH3中的至少一个H被上述列举的芳基取代而形成的一价基团。
本发明中,所述C1-C30直链或支链烷基可以为C1、C2、C3、C4、C5、C6、C8、C9、C10、C12、C13、C14、C15、C16、C18、C20、C22、C24、C26或C28等的直链或支链烷基,示例性地包括但不限于:甲基、乙基、正丙基、异丙基、正丁基、异丁基、叔丁基、正戊基、异戊基、新戊基、正己基、正辛基、正庚基、正壬基、正癸基等。
所述C1-C30(例如C1、C2、C3、C4、C5、C6、C8、C9、C10、C12、C13、C14、C15、C16、C18、C20、C22、C24、C26或C28等)烷氧基的具体示例,为O与上述列举的直链或支链烷基相连形成的一价基团。
本发明中,所述C3-C30环烷基可以为C3、C4、C5、C6、C8、C9、C10、C12、C13、C14、C15、C16、C18、C20、C22、C24、C26或C28等的环烷基;示例性地包括但不限于:环丙基、环丁基、环戊基、环己基、金刚烷基等。
本发明中,n1、n2、n3、n4分别代表取代基R1、R2、R3、R4的个数;当n1、n2、n3、n4为≥2的整数时,多个(至少2个)取代基为相同或不同的基团。
本发明中,所述“取代或未取代”的基团,可以取代有一个取代基,也可以取代有多个取代基,当取代基为多个(至少2个)时,多个(至少2个)为相同或不同的基团;取代基可以连接在基团中任意可以连接的位置。下文涉及到相同的表达方式时,均具有同样的含义。
在一个实施方式中,L、A、R1、R2、R3、R4中所述取代的取代基各自独立地选自卤素、氰基、未取代或R'取代的C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)直链或支链烷基、C3-C10(例如C3、C4、C5、C6、C7、C8、C9或C10)环烷基、未取代或R'取代的C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)烷氧基、未取代或R'取代的C6-C20(例如C6、C9、C10、C12、C14、C16或C18等)芳基、未取代或R'取代的C3-C20(例如C3、C4、C5、C6、C9、C10、C12、C14、C16或C18等)杂芳基、未取代或R'取代的C6-C20(例如C6、C9、C10、C12、C14、C16或C18等)芳胺基中的至少一种。
R'选自卤素、氰基、C1-C6(例如C1、C2、C3、C4、C5或C6)直链或支链烷基、C6-C12(例如C6、C9、C10或C12等)芳基或C3-C12(例如C3、C4、C5、C6、C9、C10或C12等)杂芳基中的至少一种。
在一个实施方式中,所述L选自单键、取代或未取代的C6-C20(例如C6、C9、C10、C12、C14、C16或C18等)亚芳基、取代或未取代的C3-C20(例如C3、C4、C5、C6、C9、C10、C12、C14、C16或C18等)亚氮杂芳基中的任意一种。
L中所述取代的取代基各自独立地选自氰基、未取代或卤代的C1-C6(例如C1、C2、C3、C4、C5或C6)直链或支链烷基、C6-C12(例如C6、C9、C10或C12等)芳基或C3-C12(例如C3、C4、C5、C6、C9、C10或C12等)杂芳基中的至少一种。
在一个实施方式中,所述L选自单键、 中的任意一种;其中,虚线代表基团的连接位点。
在一个实施方式中,所述A选自如下基团中的任意一种:
其中,虚线代表基团的连接位点;
R11、R12各自独立地选自氢、卤素、氰基、未取代或R'取代的C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)直链或支链烷基、C3-C10(例如C3、C4、C5、C6、C7、C8、C9或C10)环烷基、未取代或R'取代的C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)烷氧基、未取代或R'取代的C6-C20(例如C6、C9、C10、C12、C14、C16或C18等)芳基、未取代或R'取代的C3-C20(例如C3、C4、C5、C6、C9、C10、C12、C14、C16或C18等)杂芳基中的任意一种。
R13、R14各自独立地选自卤素、氰基、未取代或R'取代的C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)直链或支链烷基、C3-C10(例如C3、C4、C5、C6、C7、C8、C9或C10)环烷基、未取代或R'取代的C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)烷氧基、未取代或R'取代的C6-C20(例如C6、C9、C10、C12、C14、C16或C18等)芳基、未取代或R'取代的C3-C20(例如C3、C4、C5、C6、C9、C10、C12、C14、C16或C18等)杂芳基中的任意一种。
R'选自卤素、氰基、C1-C6(例如C1、C2、C3、C4、C5或C6)直链或支链烷基、C6-C12(例如C6、C9、C10或C12等)芳基或C3-C12(例如C3、C4、C5、C6、C9、C10或C12等)杂芳基中的至少一种。
U1为或CR15R16。
U2为CR15R16、
U3为O、S或NR17。
R15、R16、R17各自独立地选自C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)直链或支链烷基、C6-C20(例如C6、C9、C10、C12、C14、C16或C18等)芳基或C3-C20(例如C3、C4、C5、C6、C9、C10、C12、C14、C16或C18等)杂芳基中的任意一种。
L11选自单键或C6-C20(例如C6、C9、C10、C12、C14、C16或C18等)亚芳基中的任意一种;当L11为单键时,代表B原子与式I中的L直接相连。
m1、m2各自独立地选自0-3的整数,例如可以为0、1、2或3。
在一个实施方式中,所述R11、R12各自独立地选自氢、氰基、C1-C6(例如C1、C2、C3、C4、C5或C6)直链或支链烷基、未取代或R'取代的苯基、未取代或R'取代的萘基、未取代或R'取代的的吡啶基、未取代或R'取代的嘧啶基、未取代或R'取代的吡嗪基、未取代或R'取代的喹啉基、未取代或R'取代的异喹啉基、未取代或R'取代的喹喔啉基、未取代或R'取代的喹唑啉基中的任意一种;R'选自氰基、C1-C6(例如C1、C2、C3、C4、C5或C6)直链或支链烷基、苯基、吡啶基、嘧啶基或吡嗪基中的至少一种。
在一个实施方式中,所述A为吸电子性的基团,示例性地包括但不限于:含有卤代基团和/或氰基的C6-C30芳基、取代或未取代的C3-C30含N杂芳基、取代或未取代的C6-C30芳基酮基、取代或未取代的C6-C30芳基砜基、取代或未取代的C6-C30芳基硼基。
在另一实施方式中,所述A为供电子性的基团,示例性地包括但不限于:咔唑基及其衍生物(N-苯基咔唑基、N-萘基咔唑基、苯并咔唑基、二苯并咔唑基、吲哚并咔唑基等)、二苯并呋喃基、二苯并噻吩基等。
在一个实施方式中,所述A选自如下基团中的任意一种:
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其中,RA1选自氰基、C1-C6直链或支链烷基、苯基、吡啶基、联苯基、萘基、 中的任意一种;虚线代表基团的连接位点。
在一个实施方式中,所述R1、R2、R3、R4各自独立地选自未取代或卤代的C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)直链或支链烷基、C3-C10(例如C3、C4、C5、C6、C7、C8、C9或C10)环烷基、未取代或卤代的C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)烷氧基、取代或未取代的C6-C20(例如C6、C9、C10、C12、C14、C16或C18等)芳基、取代或未取代的C3-C20(例如C3、C4、C5、C6、C9、C10、C12、C14、C16或C18等)杂芳基、取代或未取代的C6-C20(例如C6、C9、C10、C12、C14、C16或C18等)芳胺基中的任意一种。
所述取代的芳基、取代的杂芳基中的取代基各自独立地选自卤素、氰基、未取代或卤代的C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)直链或支链烷基中的至少一种。
在一个实施方式中,所述R1、R2、R3、R4各自独立地选自未取代或卤代的C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)直链或支链烷基、C3-C10(例如C3、C4、C5、C6、C7、C8、C9或C10)环烷基、未取代或卤代的C1-C10(例如C1、C2、C3、C4、C5、C6、C7、C8、C9或C10)烷氧基、苯基、萘基、联苯基、吡啶基、咔唑基或二苯胺基中的任意一种。
在一个实施方式中,所述n1、n2、n3、n4各自独立地选自0-2的整数,例如为0、1或2。
在一个实施方式中,所述有机化合物选自如下化合物P1-P163中的任意一种:
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在一个实施方式中,本发明提供一种OLED器件,所述OLED器件包括阳极、阴极以及设置于所述阳极和阴极之间的有机薄膜层,所述有机薄膜层包括至少一种如目的之一所述的有机化合物。
在一个实施方式中,所述有机薄膜层包括发光层,所述发光层包括至少一种(例如一种或两种)如目的之一所述的有机化合物。
在一个实施方式中,所述有机化合物作为发光层的主体材料。
在一个实施方式中,所述有机化合物作为发光层的绿光主体材料。
本发明所述有机化合物以大环结构作为中心骨架,并搭配基团L、A和R1-R4,通过分子结构的设计,使其具有适宜的HOMO能级和较深的LUMO能级,能够降低电子传输的势垒,提高电子的注入能力,有效地阻挡空穴,使更多的空穴-电子在发光区进行复合,实现较高的发光效率和较低的工作电压。基于所述有机化合物的HOMO/LUMO能级,在一个实施方式中,其尤其适合作为绿光N型主体材料(绿光N型Host)。
另一方面,本发明通过特定的中心骨架与基团的设计和复配,使所述有机化合物的单线态能级较高,ES可以达到2.8eV左右,能够有效地传输电子,将空穴和激子限制在发光区,有利于扩宽发光区域,提升器件的效率和寿命。在另一实施方式中,所述有机化合物作为发光层的蓝光主体材料(蓝光Host)。
在一个实施方式中,所述有机薄膜层包括电子传输层,所述电子传输层包括至少一种如目的之一所述的有机化合物。
在一个实施方式中,所述有机薄膜层包括空穴阻挡层,所述空穴阻挡层包括至少一种如目的之一所述的有机化合物。
在一个实施方式中,所述OLED器件的阳极材料可以为金属、金属氧化物或导电性聚合物;其中,所述金属包括铜、金、银、铁、铬、镍、锰、钯、铂等及它们的合金,所述金属氧化物包括氧化铟锡(ITO)、氧化铟锌(IZO)、氧化锌、氧化铟镓锌(IGZO)等,所述导电性聚合物包括聚苯胺、聚吡咯、聚(3-甲基噻吩)等。除以上有助于空穴注入的材料及其组合,还包括已知的适合做阳极的材料。
所述OLED器件的阴极材料可以为金属或多层金属材料;其中,所述金属包括铝、镁、银、铟、锡、钛等及它们的合金,所述多层金属材料包括LiF/Al、LiO2/Al、BaF2/Al等。除以上有助于电子注入的材料及其组合,还包括已知的适合做阴极的材料。
所述OLED器件的有机薄膜层包括至少一层发光层(EML)和设置于发光层两侧的其他功能层,包括电子传输层(ETL)、空穴传输层(HTL)、空穴注入层(HIL)、电子阻挡层(EBL)、空穴阻挡层(HBL)、电子注入层(EIL)中的任意一种或至少两种的组合,其中空穴/电子注入及传输层可以为咔唑类化合物、芳胺类化合物、苯并咪唑类化合物及金属化合物等。所述OLED器件的阴极上(远离阳极的一侧)还可以任选地设置盖帽层(CPL)。
在一个实施方式中,所述OLED器件的结构示意图如图1所示,包括阳极110和阴极150,设置于所述阳极110和阴极150之间的发光层130,在发光层130的两侧设置有第一有机薄膜层120和第二有机薄膜层140,所述第一有机薄膜层120为空穴传输层(HTL)、空穴注入层(HIL)或电子阻挡层(EBL)中的任意一种或至少两种的组合,所述第二有机薄膜层140包括电子传输层(ETL)、空穴阻挡层(HBL)或电子注入层(EIL)中的任意一种或至少两种的组合。
在一个实施方式中,所述发光层130中包括至少一种本发明提供的有机化合物。
可选的,所述阴极150上(远离110的一侧)还可以设置盖帽层(CPL)。
所述OLED器件可以通过以下方法制备:在透明或不透明的光滑的基板上形成阳极,在阳极上形成有机薄层,在有机薄层上形成阴极。其中,形成有机薄层可采用如蒸镀、溅射、旋涂、浸渍、离子镀等已知的成膜方法。
在一个实施方式中,本发明提供一种显示面板,所述显示面板包括如目的之二所述的OLED器件。
在一个实施方式中,本发明提供一种电子设备,所述电子设备包括如目的之二所述的OLED器件或如目的之三所述的显示面板中的至少一种。
示例性地,本发明提供的具有如式I所示结构的有机化合物可以通过如下合成路线制备得到:
其中,L、A、R1、R2、R3、R4、n1、n2、n3、n4具有与式I中相同的限定范围。
以下示例性地列举几种本发明所述有机化合物的制备实施例:
合成例1
合成用于制备所述有机化合物的中间体,具体步骤如下:
(1)合成中间体1
在1L三口瓶中,加入0.1mol反应物M1,0.1mol反应物M2,0.30mol碳酸钾,165.6g水,1.0mmol四三苯基膦钯Pd(PPh3)4,400mL甲苯,100mL无水乙醇,N2保护下,升温至回流,保温反应8h,停反应,降温至25℃,分液,收集有机相,水洗至中性,有机相减压脱去溶剂,采用纯甲苯柱层析纯化,甲苯、无水乙醇重结晶,得到中间体1,收率85%。
(2)合成中间体2
在1L三口瓶中,加入0.1mol中间体1,0.375mol氢氧化钠,400mL无水乙醇,N2保护下,升温至回流温度,保温反应3h,降温至25℃,滴加0.375mol 10%的稀HCl溶液,搅拌0.5h,用乙酸乙酯萃取,有机相过硅胶柱,减压脱除溶剂,得到粗品中间体2;经甲苯、无水乙醇重结晶,得到精品中间体2,收率88%。
(3)合成中间体3
在500mL三口瓶中,加入0.10mol中间体2和240g甲磺酸,N2保护下升温至75℃,保温反应6h;降温至25℃,将反应液缓慢倒入250g碎冰中,搅拌、抽滤,用100mL水淋洗,得到粗品;粗品经甲苯重结晶,得到精品中间体3,收率77%。
(4)合成中间体4
在500mL三口烧瓶中,将中间体3溶于四氢呋喃(THF)中降温至-80℃,缓慢滴加1mol当量的正丁基锂,温度不超过-75℃,滴加完升至室温反应1h,将溶有反应物M3的THF溶液加入反应瓶中,将混合液回流反应3h,薄层色谱(TCL)检测反应完毕后,降至室温。用二氯甲烷萃取后,合并有机相,旋除有机溶剂,用硅胶柱层(洗脱剂:石油醚/乙酸乙酯=10/1)分离得中间体4,收率为60%。
合成例2
合成用于制备所述有机化合物的中间体,具体步骤如下:
与合成例1的区别仅在于,将步骤(4)中的反应物M3用等摩尔量的M3-A替换,其他原料、用量及工艺参数均与合成例1相同,得到中间体4-A。
合成例3
合成用于制备所述有机化合物的中间体,具体步骤如下:
与合成例1的区别仅在于,将步骤(1)中的反应物M2用等摩尔量的反应物M2-B替换,其他原料、用量、步骤、工艺参数均与合成例1相同,得到中间体4-B。
合成例4
合成用于制备所述有机化合物的中间体,具体步骤如下:
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与合成例1的区别仅在于,将步骤(1)中的反应物M1用等摩尔量的反应物M1-C替换,其他原料、用量、步骤、工艺参数均与合成例1相同,得到中间体4-C。
实施例1
一种有机化合物P3,结构为该有机化合物P3的制备方法如下:
氮气流下,将30mmol中间体4和32mmol反应物M4-3溶解于四氢呋喃后,加入70mmol碳酸钾水溶液,加热搅拌。回流状态下,加入0.5mmol催化剂Pd(PPh3)4,加热搅拌8h。反应结束后,将温度降至室温后,去除碳酸钾溶液并过滤。将过滤的固体用乙醇洗涤,得到目标产物P3。
通过基质辅助激光解吸电离飞行时间质谱分析得到MALDI-TOF:m/z计算值:C44H25N,567.20,实测值:567.43。
化合物元素分析结果(%):计算值:C 93.09,H 4.44,N 2.47;测试值:C 93.08,H4.45,N 2.47。
实施例2
一种有机化合物P27,结构为该有机化合物P27的制备方法如下:/>
与实施例1的区别仅在于,将反应物M4-3用等摩尔量的M4-27替换,其他原料、用量及工艺参数均与实施例1相同,得到目标产物P27。
MALDI-TOF:m/z计算值:C49H28N2,644.23;实测值:644.4。
化合物元素分析结果(%):计算值:C 91.28,H 4.38,N 4.34;测试值:C 91.29,H4.37,N 4.34。
实施例3
一种有机化合物P28,结构为该有机化合物P28的制备方法如下:
与实施例1的区别仅在于,将反应物M4-3用等摩尔量的M4-28替换,其他原料、用量及工艺参数均与实施例1相同,得到目标产物P28。
MALDI-TOF:m/z计算值:C50H29N3,671.24;实测值:671.47。
化合物元素分析结果(%):计算值:C 89.39,H 4.35,N 6.25;测试值:C 89.40,H4.35,N 6.25。
实施例4
一种有机化合物P40,结构为该有机化合物P40的制备方法如下:
与实施例1的区别仅在于,将反应物M4-3用等摩尔量的M4-40替换,其他原料、用量及工艺参数均与实施例1相同,得到目标产物P40。
MALDI-TOF:m/z计算值:C49H26N2,642.21;实测值:642.46。
化合物元素分析结果(%):计算值:C 91.56,H 4.08,N 4.36;测试值:C 91.55,H4.09,N 4.36。
实施例5
一种有机化合物P44,结构为该有机化合物P44的制备方法如下:
与实施例1的区别仅在于,将反应物M4-3用等摩尔量的M4-44替换,其他原料、用量及工艺参数均与实施例1相同,得到目标产物P44。
MALDI-TOF:m/z计算值:C57H34N2,746.27;实测值:746.52。
化合物元素分析结果(%):计算值:C 91.66,H 4.59,N 3.75;测试值:C 91.67,H4.58,N 3.75。
实施例6
一种有机化合物P54,结构为该有机化合物P54的制备方法如下:
与实施例1的区别仅在于,将反应物M4-3用等摩尔量的M4-54替换,其他原料、用量及工艺参数均与实施例1相同,得到目标产物P54。
MALDI-TOF:m/z计算值:C55H32N2,720.26;实测值:720.54。
化合物元素分析结果(%):计算值:C 91.64,H 4.47,N 3.89;测试值:C 91.63,H4.48,N 3.89。
实施例7
一种有机化合物P97,结构为该有机化合物P97的制备方法如下:
与实施例1的区别仅在于,将反应物M4-3用等摩尔量的M4-97替换,其他原料、用量及工艺参数均与实施例1相同,得到目标产物P97。
MALDI-TOF:m/z计算值:C47H26N2,618.21;实测值:618.39。
化合物元素分析结果(%):计算值:C 91.24,H 4.24,N 4.53;测试值:C 91.23,H4.24,N 4.53。
实施例8
一种有机化合物P101,结构为该有机化合物P101的制备方法如下:
与实施例1的区别仅在于,将反应物M4-3用等摩尔量的M4-101替换,其他原料、用量及工艺参数均与实施例1相同,得到目标产物P101。
MALDI-TOF:m/z计算值:C43H24N2,568.19;实测值:568.44。
化合物元素分析结果(%):计算值:C 90.82,H 4.25,N 4.93;测试值:C 90.83,H4.24,N 4.93。
实施例9
一种有机化合物P114,结构为该有机化合物P114的制备方法如下:/>
与实施例1的区别仅在于,将中间体4用等摩尔量的中间体4-A替换,将反应物M4-3用等摩尔量的M4-114替换,其他原料、用量及工艺参数均与实施例1相同,得到目标产物P114。
MALDI-TOF:m/z计算值:C62H36N4,836.29;实测值:836.47。
化合物元素分析结果(%):计算值:C 88.97,H 4.34,N 6.69;测试值:C 88.96,H4.35,N 6.69。
实施例10
一种有机化合物P143,结构为该有机化合物P143的制备方法如下:
与实施例1的区别仅在于,将中间体4用等摩尔量的中间体4-B替换,将反应物M4-3用等摩尔量的M4-143替换,其他原料、用量及工艺参数均与实施例1相同,得到目标产物P143。
MALDI-TOF:m/z计算值:C61H37N3,811.30;实测值:811.53。
化合物元素分析结果(%):计算值:C 90.23,H 4.59,N 5.18;测试值:C 90.24,H4.58,N 5.18。
实施例11
一种有机化合物P153,结构为该有机化合物P153的制备方法如下:
与实施例1的区别仅在于,将中间体4用等摩尔量的中间体4-C替换,将反应物M4-3用等摩尔量的M4-153替换,其他原料、用量及工艺参数均与实施例1相同,得到目标产物P153。
MALDI-TOF:m/z计算值:C67H40N4,900.33;实测值:900.52。
化合物元素分析结果(%):计算值:C 89.31,H 4.47,N 6.22;测试值:C 89.32,H4.46,N 6.22。
化合物的模拟计算:
运用密度泛函理论(DFT),针对本发明提供的有机化合物,通过Gaussian 09程序包(Gaussian Inc.)在B3LYP/6-31G(d)计算水平下,优化并计算得到了分子前线轨道HOMO和LUMO的分布情况和能级,根据HOMO和LUMO能级得到带隙Eg,同时基于含时密度泛函理论(TD-DFT)模拟计算了所述有机化合物分子的单线态能级ES,结果如表1所示。
表1
有机化合物 | LUMO(eV) | HOMO(eV) | Eg(eV) | ES(eV) |
P3 | -1.77 | -5.38 | 3.61 | 2.840 |
P27 | -2.07 | -5.55 | 3.48 | 2.803 |
P28 | -1.95 | -5.54 | 3.59 | 2.923 |
P40 | -2.17 | -5.62 | 3.45 | 2.868 |
P44 | -1.92 | -5.49 | 3.57 | 2.939 |
P54 | -1.94 | -5.52 | 3.58 | 2.895 |
P97 | -1.85 | -5.43 | 3.58 | 2.802 |
P101 | -2.11 | -5.57 | 3.46 | 2.751 |
P114 | -2.01 | -5.30 | 3.29 | 2.908 |
P153 | -2.17 | -5.72 | 3.55 | 2.926 |
根据表1的计算结果可知,本发明通过分子结构的特殊设计,使所述有机化合物具有适宜的HOMO和LUMO能级,HOMO能级与LUMO能级更深,单线态能级ES较高,ES为2.75-2.94eV,可以很好地与现有量产运用的相邻层材料的能级相匹配,有效地传输电子,将空穴和激子限制在发光区,利于扩宽发光区域,提升器件发光效率和寿命,其作为OLED材料,尤其适用于主体材料。
以下列举几种本发明所述有机化合物应用于OLED器件中的应用例:
应用例1
一种OLED器件,其结构示意图如图2所示,依次层叠的基板160,阳极110,第一空穴传输层121,第二空穴传输层122,发光层130,第一电子传输层141,第二电子传输层142,阴极150,盖帽层170;其中,所述阳极为氧化铟锡(ITO),厚度为15nm,所述第一空穴传输层为10nm,所述第二空穴传输层为95nm,所述发光层为30nm,所述第一电子传输层为35nm,所述第二电子传输层为5nm,所述阴极为镁银电极,镁银质量比为1:9,厚度为15nm,所述盖帽层(CPL)为100nm。
所述OLED器件的制备方法包括如下步骤:
(1)将玻璃基板切成50mm×50mm×0.7mm的大小,分别在异丙醇和去离子水中超声处理30min,然后暴露在臭氧下清洁10min;将通过磁控溅射所得的具有ITO阳极的玻璃基板安装到真空沉积设备上;
(2)在真空度为2×10-6Pa下,在ITO阳极上真空蒸镀化合物HAT-CN,厚度为10nm,作为第一空穴传输层;
(3)在第一空穴传输层上真空蒸镀化合物TAPC作为第二空穴传输层,厚度为95nm;
(4)在第二空穴传输层上真空蒸镀发光层,采用本发明提供的有机化合物P3和有机化合物P163作为主体材料(P3与P163的质量比为4:6),Ir(MDQ)2(acac)作为掺杂材料,主体材料和Ir(MDQ)2(acac)的质量比为97:3,厚度为30nm;
(5)在发光层上真空蒸镀化合物BCP作为第一电子传输层,厚度为35nm;
(6)在第一电子传输层上真空蒸镀化合物Alq3作为第二电子传输层,厚度为5nm;
(7)在第二电子传输层上真空蒸镀镁银电极作为阴极,Mg和Ag质量比为1:9,厚度为15nm;
(8)在阴极上真空蒸镀高折射率的化合物CBP,厚度为100nm,作为盖帽层(阴极覆盖层,CPL),得到所述OLED器件。
所述OLED器件中所使用的材料结构如下:
应用例2-12
一种OLED器件,其与应用例1的区别仅在于,将步骤(4)中的有机化合物P3分别用等量的有机化合物P27、P28、P40、P44、P54、P97、P101、P143、P153、P156、P159替换;器件的结构、厚度、其它材料及制备方法均与应用例1相同。
应用例13
一种OLED器件,其与应用例1的区别仅在于,将步骤(4)中的主体材料(P3与P163的组合)用等量的有机化合物P114替换;器件的结构、厚度、其它材料及制备方法均与应用例1相同。
对比例1
一种OLED器件,其与应用例1的区别仅在于,将步骤(4)中的主体材料(P3与P163的组合)用等量的对比化合物mCP替换;器件的结构、厚度、其它材料及制备方法均与应用例1相同。
OLED器件的性能评价:
用Keithley 2365A数字纳伏表测试OLED器件在不同电压下的电流,然后用电流除以发光面积得到OLED器件在不同电压下的电流密度;用Konicaminolta CS-2000分光辐射亮度计测试OLED器件在不同电压下的亮度和辐射能流密度;根据OLED器件在不同电压下的电流密度和亮度,得到在相同电流密度下(10mA/cm2)的启亮电压和电流效率(CE,Cd/A),Von为亮度1Cd/m2下的启亮电压;通过测量OLED器件的亮度达到初始亮度的95%时的时间而获得寿命LT95(在50mA/cm2测试条件下)。
以对比例1(REF)的启亮电压Von、电流效率CE和寿命LT95的测试数据为100%计,应用例1-13的Von、CE和LT95分别为各自的测试数据与对比例1的测试数据的比值,即为与对比例1相比的相对值;具体数据如表2所示。
表2
OLED器件 | 发光层主体材料 | Von | CE | LT95 |
应用例1 | P3/P163 | 96.8% | 106.5% | 107.2% |
应用例2 | P27/P163 | 96.4% | 105.8% | 108.3% |
应用例3 | P28/P163 | 97.4% | 105.4% | 108.6% |
应用例4 | P40/P163 | 98.1% | 105.6% | 106.8% |
应用例5 | P44/P163 | 97.6% | 107.3% | 106.0% |
应用例6 | P54/P163 | 97.1% | 106.2% | 107.5% |
应用例7 | P97/P163 | 96.7% | 107.8% | 105.9% |
应用例8 | P101/P163 | 97.8% | 106.1% | 105.7% |
应用例9 | P143/P163 | 97.6% | 103.8% | 104.2% |
应用例10 | P153/P163 | 97.8% | 108.1% | 106.2% |
应用例11 | P156/P163 | 97.3% | 106.4% | 105.8% |
应用例12 | P159/P163 | 97.0% | 105.5% | 108.1% |
应用例13 | P114 | 97.8% | 105.3% | 107.3% |
对比例1(REF) | mCP | 100% | 100% | 100% |
从表2可以看出,相对于对比例1中的器件,使用本发明所述有机化合物的OLED器件具有较低的工作电压、较高的发光效率以及较长的寿命。相对于对比例,采用本发明所述有机化合物的OLED器件的工作电压得到降低,发光效率明显提升,寿命明显延长。这可能得益于本发明的有机化合物LUMO能级较深,使得电子注入更为顺利,从而降低器件的工作电压;所述有机化合物具有合适的HOMO值,可以有效地阻挡空穴,将空穴限制在发光区与电子进行复合,有利于扩宽发光复合区域,提升器件发光效率;同时本发明所述有机化合物具有良好的热稳定性和成膜性,有利于器件的稳定性,提升器件寿命。
申请人声明,本发明通过上述实施例来说明本发明的一种有机化合物及其应用,但本发明并不局限于上述工艺步骤,即不意味着本发明必须依赖上述工艺步骤才能实施。所属技术领域的技术人员应该明了,对本发明的任何改进,对本发明所选用原料的等效替换及辅助成分的添加、具体方式的选择等,均落在本发明的保护范围和公开范围之内。
Claims (16)
1.一种有机化合物,其特征在于,所述有机化合物具有如式I所示结构:
其中,L选自单键、取代或未取代的C6-C20亚芳基、取代或未取代的C3-C20亚氮杂芳基中的任意一种;L中所述取代的取代基各自独立地选自氰基、未取代或卤代的C1-C6直链或支链烷基、C6-C12芳基或C3-C12杂芳基中的至少一种;
A选自取代或未取代的C6-C30芳基、取代或未取代的C3-C30杂芳基中的任意一种;A中所述C3-C30杂芳基中的杂原子为N;
R1、R2、R3、R4各自独立地选自卤素、氰基、取代或未取代的C1-C10直链或支链烷基、取代或未取代的C3-C10环烷基、取代或未取代的C1-C10烷氧基、取代或未取代的C6-C20芳基、取代或未取代的C3-C20杂芳基、取代或未取代的C6-C20芳胺基中的任意一种;
n1、n2、n3各自独立地选自0-4的整数;
n4选自0-6的整数;
A、R1、R2、R3、R4中所述取代的取代基各自独立地选自卤素、氰基、未取代或R'取代的C1-C10直链或支链烷基、C3-C10环烷基、未取代或R'取代的C1-C10烷氧基、未取代或R'取代的C6-C20芳基、未取代或R'取代的C3-C20杂芳基、未取代或R'取代的C6-C20芳胺基中的至少一种;
R'选自卤素、氰基、C1-C6直链或支链烷基、C6-C12芳基或C3-C12杂芳基中的至少一种。
2.根据权利要求1所述的有机化合物,其特征在于,所述L选自单键、 中的任意一种;其中,虚线代表基团的连接位点。
3.根据权利要求1所述的有机化合物,其特征在于,所述A选自如下基团中的任意一种:
其中,虚线代表基团的连接位点;
R11选自氢、卤素、氰基、未取代或R'取代的C1-C10直链或支链烷基、C3-C10环烷基、未取代或R'取代的C1-C10烷氧基、未取代或R'取代的C6-C20芳基、未取代或R'取代的C3-C20杂芳基中的任意一种;
R13选自卤素、氰基、未取代或R'取代的C1-C10直链或支链烷基、C3-C10环烷基、未取代或R'取代的C1-C10烷氧基、未取代或R'取代的C6-C20芳基、未取代或R'取代的C3-C20杂芳基中的任意一种;
R'选自卤素、氰基、C1-C6直链或支链烷基、C6-C12芳基或C3-C12杂芳基中的至少一种;
m1选自0-3的整数。
4.根据权利要求3所述的有机化合物,其特征在于,所述R11选自氢、氰基、C1-C6直链或支链烷基、未取代或R'取代的苯基、未取代或R'取代的萘基、未取代或R'取代的的吡啶基、未取代或R'取代的嘧啶基、未取代或R'取代的吡嗪基、未取代或R'取代的喹啉基、未取代或R'取代的异喹啉基、未取代或R'取代的喹喔啉基、未取代或R'取代的喹唑啉基中的任意一种;R'选自氰基、C1-C6直链或支链烷基、苯基、吡啶基、嘧啶基或吡嗪基中的至少一种。
5.根据权利要求1所述的有机化合物,其特征在于,所述A选自如下基团中的任意一种:
其中,RA1选自氰基、C1-C6直链或支链烷基、苯基、吡啶基、联苯基、萘基、中的任意一种;虚线代表基团的连接位点。
6.根据权利要求1所述的有机化合物,其特征在于,所述R1、R2、R3、R4各自独立地选自未取代或卤代的C1-C10直链或支链烷基、C3-C10环烷基、未取代或卤代的C1-C10烷氧基、取代或未取代的C6-C20芳基、取代或未取代的C3-C20杂芳基、取代或未取代的C6-C20芳胺基中的任意一种;
所述取代的芳基、取代的杂芳基中的取代基各自独立地选自卤素、氰基、未取代或卤代的C1-C10直链或支链烷基中的至少一种。
7.根据权利要求1所述的有机化合物,其特征在于,所述R1、R2、R3、R4各自独立地选自未取代或卤代的C1-C10直链或支链烷基、C3-C10环烷基、未取代或卤代的C1-C10烷氧基、苯基、萘基、联苯基、吡啶基、咔唑基或二苯胺基中的任意一种。
8.根据权利要求1所述的有机化合物,其特征在于,所述n1、n2、n3、n4各自独立地选自0-2的整数。
9.根据权利要求1所述的有机化合物,其特征在于,所述有机化合物选自如下化合物中的任意一种:
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10.一种OLED器件,其特征在于,所述OLED器件包括阳极、阴极以及设置于所述阳极和阴极之间的有机薄膜层,所述有机薄膜层包括至少一种如权利要求1-9任一项所述的有机化合物。
11.根据权利要求10所述的OLED器件,其特征在于,所述有机薄膜层包括发光层,所述发光层包括至少一种如权利要求1-9任一项所述的有机化合物。
12.根据权利要求11所述的OLED器件,其特征在于,所述有机化合物作为发光层的绿光主体材料。
13.根据权利要求10所述的OLED器件,其特征在于,所述有机薄膜层包括电子传输层,所述电子传输层包括至少一种如权利要求1-9任一项所述的有机化合物。
14.根据权利要求10所述的OLED器件,其特征在于,所述有机薄膜层包括空穴阻挡层,所述空穴阻挡层包括至少一种如权利要求1-9任一项所述的有机化合物。
15.一种显示面板,其特征在于,所述显示面板包括如权利要求10-14任一项所述的OLED器件。
16.一种电子设备,其特征在于,所述电子设备包括如权利要求10-14任一项所述的OLED器件或如权利要求15所述的显示面板中的至少一种。
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