- A novel host material with high thermal stability for green electrophosphorescent device
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A new bipolar host material based on triphenylamine, fluorene and 1,2-diphenyl-1H-benzo[d]imidazole moieties, N,N-diphenyl-4-(9-phenyl-2-(4-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl)-9H-fluoren-9-yl)aniline (DPPBIPFA), was designed and synthesized. The as-synthesized material was well characterized by1H and13C NMR spectroscopy, high-resolution mass spectrometry and thermogravimetric analysis, respectively. The photophysical and electrochemical properties of the material were also studied. The material exhibited an excellent thermal stability (Td= 475 °C), electrochemical stability and high triplet energy (2.68 eV). A green phosphorescent organic light-emitting diode (PhOLED) device based on DPPBIPFA as the host material and Ir(ppy)3as the dopant was fabricated, which displayed favorable electrophosphorescent properties with a turn-on voltage of 3.75 V, a maximum brightness of 1685 cd/m2and a maximum current efficiency of 4.26 cd/A.
- Liang, Wenqing,Gao, Zhixiang,Song, Wenxuan,Su, Jianhua,Guo, Kunpeng,Dong, Qingchen,Huang, Jinhai,Wong, Wai-Yeung
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Read Online
- Preparation method 2 -amino -9-9 - diphenyl fluorene
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The invention discloses a preparation method of 2 - amino -9 and 9 - diphenyl fluorene, which comprises the following steps: taking 9 - fluorenone as a raw material, and carrying out bromination reaction to obtain 2 - bromo -9 - fluorenone. 2 - Bromo -9 - fluorenone and bromobenzene formative reagent are reacted to obtain 2 - bromo -9 - phenyl -9 - hydroxyl - fluorene. 2 - Bromo -9 - phenyl -9 - hydroxy - fluorene was subjected to an alkylation reaction with benzene to give 2 - bromo -9, 9 - diphenylfluorene. 2 - Bromo -9, 9 - diphenylfluorene and cuprous oxide, palladium acetate (II) and N - methylpyrrolidinone were reacted in liquid ammonia to give 2 - amino -9, 9 - diphenylfluorene. The preparation method is used for preparing 2 - amino -9 and 9 - diphenylfluorene, the used preparation is easy to obtain, the technological process is simple, the product yield is high, the production cost is reduced, 2 - amino -9 and 9 - diphenyl fluorene are produced.
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- Ink Composition and Method for Manufacturing Organic Light Emitting Device
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The present specification relates to an ink composition including: a compound represented by Formula 1; and a solvent represented by the Formula 2, and a method for manufacturing an organic light emitting device formed by using the ink composition.
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Paragraph 0215-0216
(2021/02/19)
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- Compound, Coating Composition Comprising Same, and Organic Light-Emitting Device
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The present specification relates to a compound, a coating composition including the same, and an organic light emitting device.
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Paragraph 0184-0185
(2021/05/21)
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- Supramolecular Non-Helical One-Dimensional Channels and Microtubes Assembled from Enantiomers of Difluorenol
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The design and assembly of photoelectro-active molecular channel structures is of great importance because of their advantages in charge mobility, photo-induced electron transfer, proton conduction, and exciton transport. Herein, we report the use of racemic 9,9′-diphenyl-[2,2′-bifluorene]-9,9′-diol (DPFOH) enantiomers to produce non-helical 1D channel structures. Although the individual molecule does not present any molecular symmetry, two pairs of racemic DPFOH enantiomers can form a C2-symmetric closed loop via the stereoscopic herringbone assembly. Thanks to the special symmetry derived from the enantiomer pairs, the multiple supramolecular interactions, and the padding from solvent molecules, this conventionally unstable topological structure is achieved. The etching of solvent in 1D channels leads to the formation of microtubes, which exhibit a significant lithium-ion conductivity of 1.77×10?4 S cm, indicating the potential research value of this novel 1D channel structure.
- Wang, Sha-Sha,Liu, Yi-Ran,Yu, Xiang,Zhou, Yang,Zhong, Tao-Tao,Li, Yue-Tian,Xie, Ling-Hai,Huang, Wei
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supporting information
p. 3979 - 3983
(2020/12/25)
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- Cyclic tension organic material synthesis and preparation and application thereof
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A cyclic tension organic material, characterized in that a cyclic molecule having a ring tension and a structural rigidity is constructed based on fluorene or fluorene, wherein n is a natural number of 1-10 and R is a natural number in the general formula
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Paragraph 0033-0038
(2021/10/20)
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- COMPOUND, COATING COMPOSITION COMPRISING SAME, ORGANIC LIGHT-EMITTING DEVICE USING SAME AND METHOD FOR PREPARING SAME
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The present specification relates to a compound of Chemical Formula 1, a coating composition including the compound of Chemical Formula 1, an organic light emitting device using the same, and a method for manufacturing the same.
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Paragraph 0238-0242
(2020/03/01)
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- MANUFACTURING METHOD OF ORGANIC COMPOUND
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A specification of the present invention provides a method for manufacturing an organic compound. The method comprising: a first step of making a compound represented by chemical formula 1 react with phenylmagnesium bromide; and a second step of making phenol react with a first product obtained through the first step. The present specification is intended to provide the method of manufacturing an organic compound capable of mass production without including a cryogenic process.COPYRIGHT KIPO 2020
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Paragraph 0157-0160; 0170
(2020/06/05)
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- MANUFACTURING METHOD OF ORGANIC COMPOUND
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The present specification provides a method for manufacturing an organic compound, comprising: a first step of making a compound represented by chemical formula 1 react with phenylmagnesium bromide; and a second step of making phenol react with a first product obtained through the first step, wherein the second step includes a process of purifying a second product through a recrystallization process. The present specification is intended to provide the method of manufacturing an organic compound capable of mass production without including a cryogenic process.COPYRIGHT KIPO 2021
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Paragraph 0182-0185; 0195
(2020/10/14)
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- A Sc(OTf)3 catalyzed dehydrogenative reaction of electron-rich (hetero)aryl nucleophiles with 9-aryl-fluoren-9-ols
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A highly efficient dehydrogenative reaction of a series of nucleophiles with 9-aryl-fluoren-9-ols has been realized by using only 2 mol% of Sc(OTf)3 as a catalyst. The corresponding indole-containing 9,9-diarylfluorenes were obtained in up to 99% yield as well as other electron-rich (hetero)arene adducts. The protocol exhibits high selectivity, mild reaction conditions and good substrate compatibility (32 examples). This protocol is further highlighted by its applications in the construction of potential electroluminescent materials.
- Zhou, Chen,Hu, Chen,Hong, Gang,He, Yuchen,Tang, Zhicong,Wang, Limin
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supporting information
p. 9615 - 9619
(2019/11/20)
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- FLUORENE-BASED COMPOUND, ORGANIC LIGHT EMITTING DEVICE USING THE SAME AND METHOD OF MANUFACTURING THE SAME
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The present invention relates to a fluorine-based compound of chemical formula 1, a coating composition including the fluorine-based compound of chemical formula 1, an organic light emitting device using the same, and a manufacturing method thereof. In chemical formula 1, L1 and L2 are identical or different and is independently a substituted or unsubstituted alkylene group; a substituted or unsubstituted cycloalkylene group; or a substituted or unsubstituted hetero arylene group; and L is a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group.COPYRIGHT KIPO 2018
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Paragraph 0271-0274
(2018/10/03)
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- MONOAMINE COMPOUND AND ORGANIC ELECTROLUMINESCENCE DEVICE INCLUDING THE SAME
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The present invention relates to a monoamine compound and an organic electroluminescence device including the same. The monoamine compound according to an embodiment of the present invention is represented by chemical formula 1. In chemical formula 1, at least one of Ar1 to Ar4 is a substituted or unsubstituted heteroaryl group.COPYRIGHT KIPO 2018
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Paragraph 0175-0177
(2018/06/09)
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- A heterocycle-containing organic electroluminescent compound and its device
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The invention provides a heterocycle-contained organic electroluminescent compound as shown in a structural formula I, and a device thereof. The compound has good thermal stability, high luminous efficiency and high luminous purity, and can be used for production of organic electroluminescent devices and applied in the fields of organic solar cells, organic thin-film transistors or organic photoreceptors. The invention also provides an organic electroluminescent device which comprises an anode, a cathode and organic layers, wherein the organic layers comprise one layer or more layers selected from the group consisting of a luminous layer, a hole injection layer, a hole transport layer, a hole blocking layer, an electron injection layer and an electron transport layer; and at least one layer of the organic layers contains the compound as shown in the structural formula I.
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- A fluorine hole transport compound
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The invention provides a fluorene-based hole transport compound with a structural formula (I) as shown in the specification. The compound has relatively good thermal stability, high luminous efficiency and high luminous purity, can be used for making organic light-emitting devices and is applied to the fields of organic solar cells, organic thin-film transistors or organic photoreceptors.
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- A fluorine hole transport compound (by machine translation)
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The invention provides a fluorene-based hole transport compound represented by the following structural formula (I). The compound has the advantages of relatively good thermal stability, high luminous efficiency, high luminous purity and low driving voltage and can be used to fabricate an organic electroluminescent device and applied in the fields of organic solar cells, organic thin-film transistor or organic photoreceptor.
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- Compound for organic photoelectric device and organic photoelectric device including the same
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A compound for an organic optoelectronic device, an organic light emitting diode including the same, and a display device including the organic light emitting diode are disclosed, the compound being represented by the following Chemical Formula 1:
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Paragraph 0186; 0189-0192
(2016/10/24)
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- LUMINESCENT COMPOUNDS AND ELECTROLUMINESCENT DEVICE USING THE SAME
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The present invention relates to organic electroluminescent compounds and organic electroluminescent devices employing the same. More specifically, the invention relates to organic electroluminescent compounds containing an anthracenyl group or an aryl group having an anthracenyl substituent m the aryl ring of fluorene or indenofluorene, as a blue electroluminescent material in an organic electroluminescent layer. The electroluminescent compounds according to the invention exhibit high luminous efficiency and excellent life property, so that an OLED device having very good operation lifetime can be prepared therefrom.
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Page/Page column 33
(2011/04/14)
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- Synthesis and photophysical properties of pyrrole/polycyclic aromatic units hybrid fluorophores
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A series of pyrrole/polycyclic aromatic unit hybrid fluorophores was developed by a two-stage synthetic strategy. Their central aryl-substituted pyrrole cores were constructed by a Paal-Knorr pyrrole synthesis reaction. The reaction conditions and mechanism are also discussed in detail. End-capping triflate onto the central pyrrole core enables the core to incorporate various polycyclic aromatic units. The Buchwald-Hartwig amination reaction and the Suzuki-Miyaura cross-coupling reaction were adopted to incorporate the triflate end-capping pyrrole with N-phenylnaphthalen-1-amine and various polycyclic aromatic units to form the hybrid fluorophores. The photophysical properties and thermal properties of the fluorophores were characterized. Most of the pyrrole fluorophores emitted blue light and exhibited high quantum efficiency. The fluorescence properties of these pyrrole fluorophores were induced by manipulating the surrounding polycyclic aromatic units. When the central pyrrole core was incorporated with amino or naphthalene moieties, the fluorescence efficiency and thermal stability of fluorophores 1 and 2 were low (φf g f > 0.99) and stable glassy morphology (the Tg value of the fluorophore 6 was as high as 220 °C). Results of this study demonstrate that the sterically induced fluorescence of crowded pyrrole and the fluorescent polycyclic aromatic units significantly affect the emission properties of the hybrid fluorophores.
- Li, Chang-Shun,Tsai, Ya-Hsuan,Lee, Wei-Chen,Kuo, Wen-Jang
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supporting information; experimental part
p. 4004 - 4013
(2010/08/19)
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- Ter(9,9-diarylfluorene)s: Highly efficient blue emitter with promising electrochemical and thermal stability
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Novel ter(9,9-diarylfluorene)s were synthesized by a Suzuki-coupling reaction of 2-bromofluorene (1) and 2,7-fluorenediboronic ester derivatives (3) with high isolated yields (63-86%). The X-ray structure analysis of ter(9,9′-spirobifluorene) (4aa) revealed that the conjugated chromophore adopts a helical conformation. This conformation effectively releases the steric interaction between the fluorene moieties and prevents inter-chromophore interactions. The introduction of aryl groups at the C9 position of fluorene was highly beneficial to the thermal and morphological stability of these oligomers. These terfluorenes exhibit intense blue fluorescence with excellent quantum yields both in solution (~100%) and in solid state (66-90%), and possess interesting reversible redox properties. Highly efficient blue light-emitting OLED devices were fabricated using 4aa and 4cc as emitters as well as hole transporters. The devices exhibit low turn-on voltage (~3 V) and high EL external quantum efficiency (2.5-3%). Copyright
- Wong, Ken-Tsung,Chien, Yuh-Yih,Chen, Ruei-Tang,Wang, Chung-Feng,Lin, Yu-Ting,Chiang, Huo-Hsien,Hsieh, Ping-Yuan,Wu, Chung-Chih,Chou, Chung Hsien,Su, Yuhlong Oliver,Lee, Gene-Hsiang,Peng, Shie-Ming
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p. 11576 - 11577
(2007/10/03)
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