668493-36-5Relevant articles and documents
Organic light-emitting material containing triazine group and aniline group, application as well as device
-
Paragraph 0059, (2018/06/16)
The invention belongs to the field of preparation and application science and technology of organic light-emitting materials, and particularly relates to an organic light-emitting material containingtriazine group and aniline group and a preparation method thereof, application as well as a device. The organic light-emitting material provided by the invention takes triazine and benzidine as cores,and has excellent heat stability so as to be beneficial to the improvement of efficiency and stability of the device, has high fluorescence quantum yield to be used as a light-emitting guest materialand has good dual polarity to be used as a light-emitting host material.
2,2,2-trifluoroacetophenone-based D-π-A type photoinitiators for radical and cationic photopolymerizations under near-UV and visible LEDs
Jin, Ming,Yu, Man,Zhang, Yuan,Wan, Decheng,Pu, Hongting
, p. 1945 - 1954 (2016/05/24)
Two D-π-A-type 2,2,2-trifluoroacetophenone derivatives, namely, 4′-(4-(N,N-diphenyl)amino-phenyl)-phenyl-2,2,2-trifluoroacetophenone (PI-Ben) and 4′-(4-(7-(N,N-diphenylamino)-9,9-dimethyl-9H-fluoren-2-yl)-phenyl-2,2,2-trifluoroacetophenone (PI-Flu), are developed as high-performance photoinitiators combined with an amine or an iodonium salt for both the free-radical polymerization of acrylates and the cationic polymerization of epoxides and vinyl ether upon exposure to near-UV and visible light-emitting diodes (LEDs; e.g., 365, 385, 405, and 450 nm). The photochemical mechanisms are investigated by UV-Vis spectra, molecular-orbital calculations, fluorescence, cyclic voltammetry, photolysis, and electron-spin-resonance spin-trapping techniques. Compared with 2,2,2-trifluoroacetophenone, both photoinitiators exhibit larger redshift of the absorption spectra and higher molar-extinction coefficients. PI-Ben and PI-Flu themselves can produce free radicals to initiate the polymerization of acrylate without any added hydrogen donor. These novel D-π-A type trifluoroacetophenone-based photoinitiating systems exhibit good efficiencies (acrylate conversion = 48%-66%; epoxide conversion = 85%-95%; LEDs at 365-450 nm exposure) even in low-concentration initiators (0.5%, w/w) and very low curing light intensities (1-2 mW cm-2).
PYRAZINE CARBOXYLIC ACID COMPOUND, MANUFACTURING METHOD THEREFOR AND DYE-SENSITIZED SOLAR CELL
-
Paragraph 0135-0137, (2018/10/25)
PROBLEM TO BE SOLVED: To provide a useful pyrazine carboxylic acid compound which can be used as an organic coloring matter for dye-sensitized solar cell, a semiconductor electrode containing the compound and a dye-sensitized solar cell having the semicon
One/two-photon-sensitive photoacid generators based on benzene oligomer-containing D-π-A-type aryl dialkylsulfonium salts
Jin, Ming,Wu, Xingyu,Xie, Jianchao,Malval, Jean Pierre,Wan, Decheng
, p. 55340 - 55347 (2015/07/07)
Novel sulfonium-based D-π-A photoacid generators (PAGs) with a benzene oligomer (from one to four) as a π-conjugated system that are highly photosensitive in the near-ultraviolet region (365 nm) were prepared. The maximum absorption and molar extinction coefficients of the PAGs redshifted and enhanced with the increasing length of the conjugated systems. The quantum yields of PAGs were high (three of them were over 0.6) and improved by adjusting the number of the phenyl rings. The quantum chemical calculation results proved that the molecular configuration and nature of the frontier orbitals are crucial factors which affect PAG performance. Photopolymerization kinetic results demonstrated that these sulfonium-based PAGs were highly efficient cationic photoinitiators, and the i-line sensitivities were evaluated based on the photolithographic performance of the PAG-containing SU-8 resins. In addition, the two-photon absorption cross sections (δ700 nm > 400 GM) matched the requirements needed in the 3D fabrication of polymer microstructures.
Dye-sensitized solar cell utilizing organic dyads containing triarylene conjugates
Chang, Yuan Jay,Chow, Tahsin J.
experimental part, p. 4726 - 4734 (2009/10/09)
A series of organic dipolar compounds containing a donor (D), a bridge (B), and an acceptor (A), forming a D-B-A type of dyads, were synthesized by convenient methods and were utilized successfully on dye-sensitized solar cells. The central bridges were made of three linearly connected arylene groups, i.e., phenylenes or thiophenylenes. The donor groups were aromatic amines, i.e., either a diphenylamine or a naphthylphenylamine group. The acceptor group was a cyanoacrylic acid, which can be anchored onto the surface of TiO2 in a photovoltaic device. These devices performed remarkably well, with a typical quantum efficiency of 5-7%, and optimal incident photon to current conversion efficiency (IPCE) exceeding 80%. The devices made with a naphthylphenylamine donor group performed slightly better than those made with a diphenylamine donor group. Compounds containing a phenylene-thiophenylene-phenylene bridge group performed better than those with other kinds of triarylene linkages. Their photochemical behaviors were analyzed by using time-dependent density functional theory (TDDFT) models with the B3LYP functional.
Synthesis and Functional Properties of Strongly Luminescent Diphenylamino End-Capped Oligophenylenes
Li, Zhong Hui,Wong, Man Shing,Tao, Ye,D'Iorio, Marie
, p. 921 - 927 (2007/10/03)
Two novel homologous series of oligophenylenes (OPPs) symmetrically end-capped with diphenylamino groups and asymmetrically end-capped with anthryldiphenylamino groups were successfully synthesized by a convergent approach with use of palladium-catalyzed homo- and cross-coupling of arylboronic acids. The absorption maxima of both diphenylamino end-capped OPP series do not vary with the chain length although the molar absorptivities increase sequentially. On the other hand, the emission maxima slightly shift to longer wavelengths when the phenylene unit increases in the series. All the diphenylamino end-capped oligomers exhibit very large fluorescence quantum yields (81-89%). They also exhibit low first ionization potentials, corresponding to the oxidation of the triarylamino moiety, which are essentially unaffected by the oligomeric length extension. The good thermal stabilities of these oligomers allowed the fabrication of multilayer light-emitting devices and their investigations.