Synthesis and optical properties of poly(tetramethylsilarylenesiloxane) derivative bearing diphenylcyclopentadithiophene moiety
摘要:
The thermal and optical properties of a novel diphenylcyclopentadithiophene-based poly(-tetramethylsilarylenesiloxane) derivative (P1), which was prepared via polycondensation of a novel disilanol monomer, i.e., 2,6-bis(dimethylhydroxysilyl)-4,4-diphenylcyclopentadithiophene (M1), were investigated. P1 exhibited good solubility in common organic solvents, such as benzene, toluene, chloroform, dichloromethane and THF at ambient temperature. The glass transition temperature (T-g) of P1 was determined by differential scanning calorimetry to be 109 degrees C. No melting temperature (T-m) of P1 was observed, indicating the obtained P1 was an amorphous polymer. The temperature at 5% weight loss (T-d5) of P1 was 454 degrees C, indicating the rather good thermostability of P1. Bathochromic and hyperchromic effects were observed in the absorption and fluorescence spectra by introducing dimethylsilyl substituents onto 4,4-diphenylcyclopentadithiophene skeleton. The fluorescence quantum yields (Phi(FS)) of M1 and P1 in chloroform were determined to be 0.36 and 0.39, respectively. It was revealed that M1 and P1 exhibited the higher fluorescence intensity than diphenylcyclopentadithiophene owing to the cooperative effects of the introduction of diphenyl groups onto spiro carbon of cyclopentadithiophene as well as dimethylsilyl moieties onto 2- and 6-position of cyclopentadithiophene skeleton. (C) 2014 Elsevier Ltd. All rights reserved.
Selective Halogenation of Bithiophenes Using 2-Halopyridazin-3(2H)-ones under Ambient Conditions
作者:Jong Park、Yong-Jin Yoon、Kwang-Ju Jung、Seung Kang、Ju-Eun Won、Song-Eun Park、Ki Park、Sang-Gyeong Lee
DOI:10.1055/s-0028-1087536
日期:2009.2
2,2′-Bithiophene and halogenated-2,2′-bithiophenes were halogenated with 2-halo-4,5-dichloropyridazin-3(2H)-one in the presence of zinc halide to give selectively the corresponding dihalo-, trihalo-, and tetrahalo-2,2′-bithiophenes involving the same or different halogens in excellent yields, respectively.
A new donor/acceptor (D–A) spiro dye (SCPDT1) featuring two bithiophene units, connected through an sp3-hybridized carbon atom, was prepared by a multistep synthetic sequence involving the convenient assembly of the spiro system under mild catalytic conditions. The photocurrent spectrum of dye-sensitized solar cells incorporating SCPDT1 covers the spectral region ranging from 350 to 700 nm and reaches
Polymer, method of preparing the same, and organic optoelectric device including the same
申请人:KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
公开号:US09847489B1
公开(公告)日:2017-12-19
Provided are a novel polymer, a method of preparing the same, and an organic semiconductor device including the same. According to the present invention, the fluorine content-controlled polymer is employed in an organic active layer, thereby providing an organic optoelectric device representing improved power conversion efficiency (PCE).