- Bivalent platinum coordination compound and application thereof as well as organic photoelectric device
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The invention belongs to the technical field of organic electroluminescent materials and provides a bivalent platinum coordination compound and the application thereof as well as an organic photoelectric device. The bivalent platinum coordination compound provided by the invention has a chemical structure as shown in a formula I and is a blue light emitting material. The blue light emitting material serves as a doping material in OLED light-emitting devices and equipment, and the peak value of blue light emitted by the blue light emitting material ranges between 450 and 470 nm. Benzimidazole carbene is introduced into a ligand structure of the bivalent platinum coordination compound; the benzimidazole carbene structure has proper triplet energy, has a more stable carbon platinum coordination bond compared with a nitrogen platinum coordination bond, and has a more stable excited state conjugated system compared with the imidazole carbene structure. Therefore, the whole blue light spectrum is narrower, molecules are more stable in photoluminescence and device electroluminescence, the development of the blue light emitting material is promoted and the properties of light-emitting devices are improved.
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Paragraph 0081; 0082; 0089-0091; 0102; 0103; 0107-0109; 0136
(2019/05/28)
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- Palladium-catalyzed synthesis of 2-alkenyl-3-arylindoles via a dual α-arylation strategy: Formal synthesis of the antilipemic drug fluvastatin
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A new approach has been developed for the synthesis of substituted 2-alkenyl-3-arylindoles. The strategy comprises palladium-catalyzed dual α-arylation of TES-enol ethers of enones as the key step. This methodology results in products with very good yields and the regioselectivity is exclusive. We have also successfully used this dual α-arylation methodology in the formal synthesis of the cholesterol-lowering drug fluvastatin.
- Kale, Ajit Prabhakar,Kumar, Gangam Srikanth,Kapur, Manmohan
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p. 10995 - 11002
(2015/11/25)
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- Diazaborolyl-boryl push-pull systems with ethynylene-arylene bridges as 'turn-on' fluoride sensors
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Two linear π-conjugated systems with 1,3-diethyl-1,3,2-benzodiazaborolyl [C6H4(NEt)2B-] as a donor group and dimesitylboryl (-BMes2) as acceptor were synthesised with -ethynylene-phenylene- (-CC-1,4-C6H4-, 3) and -ethynylene-thiophene- (-CC-2,5-C4H2S- 12) bridges between the boron atoms. An assembly (20) consisting of two diazaborolyl-ethynylene- phenylene-boryl units, [C6H4(NCy)(N′)B-CC-1,4-C 6H4-BMes2] joined via a 1,4-phenylene unit at the nitrogen atoms (N′) of the diazaborolyl units was also synthesised. The three push-pull systems, 3, 12 and 20, form salts on fluoride addition with the BMes2 groups converted into (BMes2F)- anions. The molecular structures of 3, 12 and (NBu4)(12·F) were elucidated by X-ray diffraction analyses. The borylated systems 3, 12 and 20 show intense blue luminescence in cyclohexane with quantum yields (Φfl) of 0.99, 0.44 and 0.94, respectively, but weak blue-green luminescence in tetrahydrofuran (Φfl = 0.02-0.05). The charge transfer nature of these transitions is supported by TD-DFT computations with the CAM-B3LYP functional. Addition of tetrabutylammonium fluoride to tetrahydrofuran solutions of 3 and 20 resulted in strong violet-blue luminescence with emission intensities up to 46 times more than the emission intensities observed prior to fluoride addition. Compounds 3 and 20 are demonstrated here as remarkable 'turn-on' fluoride sensors in tetrahydrofuran solutions.
- Weber, Lothar,Eickhoff, Daniel,Kahlert, Jan,Boehling, Lena,Brockhinke, Andreas,Stammler, Hans-Georg,Neumann, Beate,Fox, Mark A.
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p. 10328 - 10346,19
(2020/08/31)
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- Thermal switchability of N-chelating hoveyda-type catalyst containing a secondary amine ligand
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An investigation of aza analogues of the popular Hoveyda-Grubbs catalyst containing a secondary amine ligand is presented, proving the crucial impact of steric as well as electronic factors on the catalyst's stability and performance. The issue of latency in the reactivity profile of studied catalysts is examined, followed by structural and application studies.
- Zukowska, Karolina,Szadkowska, Anna,Pazio, Aleksandra E.,Wo?niak, Krzysztof,Grela, Karol
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experimental part
p. 462 - 469
(2012/04/23)
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- Enantioselective synthesis of 2-methyl indolines by palladium catalysed asymmetric C(sp3)-H activation/cyclisation
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The first example of the enantioselective methyl C-H activation by an intramolecular ArPdX species and subsequent cyclisation was developed. Palladium catalysts using commercially available chiral diphosphines yield good ee's (up to 93% ee) in the synthesis of 2-methyl indolines from 2-halo N-isopropyl anilides. This approach was also employed for the synthesis of enantioenriched cyclohexyl fused indolines with moderate enantioselectivities.
- Anas, Saithalavi,Cordi, Alex,Kagan, Henri B.
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supporting information; experimental part
p. 11483 - 11485
(2011/11/13)
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