- Palladium(0)-catalyzed amination, stille coupling, and Suzuki coupling of electron-deficient aryl fluorides
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The amination of 2-fluoronitrobenzene was Pd(0) catalyzed at 65 °C in DMF, and the effectiveness of the catalysis was ligand-dependent. Among the five catalyst systems investigated, Pd(PPh3)4 was the most effective catalyst. The cont
- Kim, Young Mi,Yu, Shu
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- Selenium-Catalyzed Carbonylative Synthesis of 2-Benzimidazolones from 2-Nitroanilines with TFBen as the CO Source
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A selenium-catalyzed carbonylative reaction for the synthesis of 2-benzimidazolones from 2-nitroanilines has been developed. In this strategy, to avoid the usage of toxic CO gas, TFBen (benzene-1,3,5-triyl triformate) was used as a solid and stable CO precursor, and a variety of desired 2-benzimidazolones were produced in moderate to excellent yields.
- Qi, Xinxin,Zhou, Rong,Peng, Jin-Bao,Ying, Jun,Wu, Xiao-Feng
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supporting information
p. 5161 - 5164
(2019/01/25)
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- A new series of N-substituted tetraphenylethene-based benzimidazoles: Aggregation-induced emission, fast-reversible mechanochromism and blue electroluminescence
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Four new N-substituted tetraphenylethene-based benzimidazoles N-R-2-(4-(1,2,2-triphenylvinyl)phenyl)-1H-benzo[d]imidazoles (R = phenyl (3a), R = 4-(tert-butyl)phenyl (3b), R = n-butyl (3c), R = n-hexyl (3d)) were synthesized conveniently by cyclization reaction of 4-tetraphenylenthenealdehyde with N-substituted ortho-nitroaniline. The four compounds exhibit typical aggregation-induced emission (AIE) property with relatively high solid state absolute fluorescence quantum yields (38.1–65.7%) and fast-recoverable mechanochromism property with solid-state fluorescence change between blue and yellow-green. They are thermally stable with decomposition temperatures above 319 °C. Both of multilayer electroluminescence devices fabricated with compounds 3b and 3c as emitters are blue emission. The turn-on voltage of device based on compound 3b is 3.3 V with maximum luminance and current efficiency of 2470 cd/m2 and 1.48 cd/A, respectively.
- Zhang, Tengfei,Zhang, Ran,Zhao, Yun,Ni, Zhonghai
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p. 276 - 285
(2017/09/20)
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- Tetraphenylethylene-based blue light material containing benzimidazole unit as well as preparation method and application
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The invention discloses a tetraphenylethylene-based blue light material containing a benzimidazole unit. The tetraphenylethylene-based blue light material is shown as a structural formula I or II, wherein R1 is H, tert-butyl, n-butyl or hydroxyl, and R2 is alkyl. A 2-nitro-N-tert-butylphenyl amine or 2-nitro-N-n-butylphenyl amine precursor and a 4-formyl tetraphenylethylene precursor is firstly prepared, and then cyclization reaction is carried out to prepare a compound shown as the formula I or II. A preparation method of the compound is easy to operate, the reaction is moderate and the yield is high; the compound has relatively high decomposition temperature and glass-transition temperature, and shows blue fluorescence; the compound has a relatively good single-color property, so that an OLED (Organic Light Emitting Diode) device prepared by taking the compound as a luminescent material emits blue light; the starting voltage is 3.3V and the maximum brightness efficiency is 1.48cd/A. (The formula I and the formula II are shown in the description).
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Paragraph 0027; 0028; 0029
(2017/10/10)
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- Novel bemzimidazole-carbazole derivative, preparation method thereof and organic light-emitting diode using the same
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The present invention refers to of organic light-emitting device having phosphorescent blue emitting materials and can be used for high-benzimidazol-carbazole derivatives and their manufacturing method relates to, novel benzimidazole-carbazole derivatives the present invention according to an electronic it is a donator cover and antiviral electronic it is a receptor benzimidazole the combustion furnace through a blue of phosphors-emitting diodes for emitting sufficient energy to corresponding to blue has exhibits a good therefor, thermal stability and conformational invention have superior stability to in producing a thin film for an organic light-emitting device, of the physical properties of the device even at high temperatures and display good as a material of a luminescent layer without changing them since performance is kept at a, using the same useful as emitting materials for an organic light-emitting device can be used. (by machine translation)
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Paragraph 0118; 0119
(2016/10/24)
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- A heterocyclic ligands containing compounds and methods for their preparation, application (by machine translation)
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The present invention provides a compound containing heterocyclic ligands and its preparation method, an electroluminescent device. The present invention provides heterocycle-containing ligand compound, through the particular selection of heterocyclic ligands and different metal binding, can adjust the wavelength of the compound, the organic metal compound used in the organic electroluminescent device, to make the device light-emitting efficiency is improved, and the service life is long. (by machine translation)
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Paragraph 0153-0157; 0158; 0159; 0160; 0162
(2016/10/08)
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- Compound with heterocyclic ligand and preparation method and application thereof
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The invention provides a compound with a heterocyclic ligand and a preparation method and application thereof. According to the compound with the heterocyclic ligand, the specific heterocyclic ligand is selected to be combined with metal aluminum, so that after the obtained organic compound is applied to an organic light-emitting device, the light-emitting efficiency of the device is improved, and the service life is long.
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Paragraph 0106; 0107; 0108; 0109; 0110; 0111; 0113
(2016/10/08)
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- Lithium compound with heterocyclic ligand and preparation method and application thereof
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The invention provides a lithium compound with a heterocyclic ligand and a preparation method and application thereof. According to the lithium compound with the heterocyclic ligand, the specific heterocyclic ligand is selected to be combined with metal lithium, so that after the obtained organic lithium compound is applied to an organic light-emitting device, the light-emitting efficiency of the device is improved, and the service life is long.
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Paragraph 0123; 0124; 0125; 0126; 0128
(2016/10/08)
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- N -aryl chromophore ligands for bright europium luminescence
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Sterically hindered N-aryl-benzimidazole pyridine-2-carboxylic acids (aryl = phenyl, 4-biphenyl, 2-naphthyl) readily form homoleptic, neutral, nine-coordinate europium complexes which display efficient sensitized luminescence in solid state and in dichloromethane solution with quantum yields reaching 59% and have monoexponential and nearly temperature-independent lifetimes as long as 2.7 ms. The ligand-centered absorption band with a maximum at 321-342 nm and intensity (50-56) - 103 M-1cm -1 ensures efficient harvesting of excitation light by the complexes. Variation of N-aryl chromophore enhances the ligand absorption at 250-350 nm without changing its triplet state energy which amounts to (19.2-21.3) × 103 cm-1. Photophysical properties of europium complexes benefit from adequate protection of the metal by the ligands against non-radiative deactivation and efficient ligand-to-metal energy transfer exceeding 70%. A correlation is observed between the sensitized luminescence quantum yields of europium and the ligand triplet state energy; in certain cases it points to the presence of a second-sphere quenching of EuIII by co-crystallized water in the solid state.
- Shavaleev, Nail M.,Eliseeva, Svetlana V.,Scopelliti, Rosario,Buenzli, Jean-Claude G.
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experimental part
p. 3927 - 3936
(2010/06/14)
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- Regulation of retinoidal actions by diazepinylbenzoic acids. Retinoid synergists which activate the RXR-RAR heterodimers
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In human HL-60 promyelocytic leukemia cells, diazepinylbenzoic acid derivatives can exhibit either antagonistic or synergistic effects on the differentiation-inducing activities of natural or synthetic retinoids, the activity depending largely on the nature of the substituents on the diazepine ring. Thus, a benzolog of the retinoid antagonist LE135 (6), 4-(13H- 10,11,12,13-tetrahydro-10,10,13,13,15-pentamethyldinaphtho[2,3-b][1,2- e]diazepin-7-yl)benzoic acid (LE540, 17), exhibits a 1 order of magnitude higher antagonistic potential than the parental LE135 (6). In contrast, 4- [5H-2,3-(2,5-dimethyl-2,5-hexano)-5-methyldibenzo[b,e][1,4]diazepin-11-yl]- benzoic acid (HX600, 7), a structural isomer of the antagonistic LE135 (6), enhanced HL-60 cell differentiation induced by RAR agonists, such as Am80 (2). This synergistic effect was further increased for a thiazepine, HX630 (29), and an azepine derivative, HX640 (30); both synergized with Am80 (2) more potently than HX600 (7). Notably, the negative and positive effects of the azepine derivatives on retinoidal actions can be related to their RAR- antagonistic and RXR-agonistic properties, respectively, in the context of the RAR-RXR heterodimer.
- Umemiya, Hiroki,Fukasawa, Hiroshi,Ebisawa, Masayuki,Eyrolles, Laurence,Kawachi, Emiko,Eisenmann, Ghislaine,Gronemeyer, Hinrich,Hashimoto, Yuichi,Shudo, Koichi,Kagechika, Hiroyuki
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p. 4222 - 4234
(2007/10/03)
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