100943-46-2Relevant academic research and scientific papers
Synthesis and the effect of alkyl chain length on optoelectronic properties of diarylethene derivatives
Zheng, Chunhong,Pu, Shouzhi,Xu, Jingkun,Luo, Mingbiao,Huang, Dechao,Shen, Liang
, p. 5437 - 5449 (2007)
Photochromic symmetrical diarylethene derivatives 1a-6a bearing different long alkyl chains at 2-position of thiophene rings have been synthesized and their structures have been determined by single-crystal X-ray diffraction analysis. The effect of alkyl chain length on their optoelectronic properties, such as photochromism in solution as well as in the crystalline phase and electrochemical performance was investigated in detail. These diarylethenes have showed good photochromic behavior both in solution and in the single crystalline phase. Introduction of the long alkyl chains at 2-position of bis(5-formyl-3-thienyl)perfluorocyclopentene increased the absorption coefficients of both open- and closed-ring isomers and induced bathochromic shifts of the maximal wavelength absorption of the closed-ring isomers. The long alkyl chains can also decrease the cyclization/cycloreversion quantum yields and the oxidation potentials. The cyclic voltammetry indicated that the band gap of these diarylethene derivatives was significantly affected by the alkyl chain length.
High-performance solution-processed solar cells and ambipolar behavior in organic field-effect transistors with thienyl-BODIPY scaffoldings
Bura, Thomas,Leclerc, Nicolas,Fall, Sadiara,Lévêque, Patrick,Heiser, Thomas,Retailleau, Pascal,Rihn, Sandra,Mirloup, Antoine,Ziessel, Raymond
, p. 17404 - 17407 (2012)
Green-absorbing dipyrromethene dyes engineered from bis-vinyl-thienyl modules are planar molecules, exhibiting strong absorption in the 713-724 nm range and displaying comparable electron and hole mobilities in thin films (maximum value 1 × 10-3 cm2/(Vs)). Bulk heterojunction solar cells assembled with these dyes and a fullerene derivative (PC61BM) at a low ratio give a power conversion efficiency as high as 4.7%, with short-circuit current values of 14.2 mA/cm2, open-circuit voltage of 0.7 V, and a broad external quantum efficiency ranging from 350 to 920 nm with a maximum value of 60%.
All-polymer solar cells from perylene diimide based copolymers: Material design and phase separation control
Zhou, Erjun,Cong, Junzi,Wei, Qingshuo,Tajima, Keisuke,Yang, Chunhe,Hashimoto, Kazuhito
, p. 2799 - 2803 (2011)
It's all about polymers: All-polymer solar cells (all-PSCs) based on six perylene diimide containing polymers (PX-PDIs) as acceptor materials and two polythiophene derivatives (P3HT and PT1) as donor materials were investigated systematically (see picture). The highest power-conversion efficiency (PCE) of all-PSCs was 2.23 %, one of the highest PCEs of polymer/polymer blend photovoltaic devices reported to date. Copyright
Synthesis and properties of end-capped sexithiophenes incorporating the ethylene dithiothiophene unit
Mason, Christopher R.,Skabara, Peter J.,Cupertino, Domenico,Schofield, John,Meghdadi, Farideh,Ebner, Berndt,Sariciftci, N. Serdar
, p. 1446 - 1453 (2005)
Two new end-capped sexithiophene derivatives (10a and 10b) have been synthesised and characterised by absorption spectroscopy, cyclic voltammetry and UV-vis spectroelectrochemistry. Both oligomers undergo two reversible, sequential oxidation processes (10a: E11/2 = +0.61 V, E21/2 = +0.97 V; 10b: E11/2 = +0.70 V, E21/2 = +0.91 V vs. Ag/AgCl) and the electronic band gaps of the materials are ca. 2.2 eV (solid state). Sexithiophene 10a has been incorporated as an electron donor material, with C60 as acceptor, in a bilayer photovoltaic device. The power conversion efficiency is a modest 0.12%, whilst the maximum IPCE at 350 nm gave an external quantum efficiency of ca. 12%. The Royal Society of Chemistry 2005.
Effect of conjugated side groups on the photovoltaic performances of triphenylamine-based dyes sensitized solar cells
Long, Jun,Liu, Xunshan,Guo, Huan,Zhao, Bin,Tan, Songting
, p. 222 - 231 (2016)
Three novel organic dyes (LD1, LD2 and LD3) with conjugated side groups on the thiophene π-bridge are designed and synthesized for dye sensitized solar cells (DSSCs). The photophysical, electrochemical, and photovoltaic properties of the dyes have been successfully tuned by incorporating different conjugated side groups into the thiophene π-bridges moieties of dyes. Compared with the analogous dyes with non-conjugated side groups, the side group-conjugated dyes exhibited wider absorption spectra, higher molar extinction coefficients, and better photovoltaic performances. For the LD2-based DSSCs, the maximum power conversion efficiency (PCE) of 7.71% is obtained under AM 1.5 G irradiation (100 mW cm-2). The result demonstrates that high-performance DSSCs can be acquired by choosing suitable conjugated side groups into the π-bridges moieties of organic dyes.
High-performance organic semiconductors for thin-film transistors based on 2,6-bis(2-thienylvinyl)anthracene
Um, Myoung-Chul,Jang, Junhyuk,Kang, Jihoon,Hong, Jung-Pyo,Yoon, Do Yeung,Lee, Seong Hoon,Kim, Jang-Joo,Hong, Jong-In
, p. 2234 - 2239 (2008)
We have synthesized two novel organic semiconductors, which have a symmetrically substituted thienylvinylene anthracene backbone. They show good electrical performances on SiO2/Si, with high field-effect mobilities of up to 0.4 cm2 V-1 s-1, and can easily be synthesized in large quantities. In addition, the high mobility of such semiconductors can be achieved at low substrate deposition temperatures. The Royal Society of Chemistry.
6-(Arylvinylene)-3-pyridinylboronic esters. Part 1: Versatile building blocks for conjugated chromophores via Suzuki cross-coupling
Leclerc, Nicolas,Serieys, Isabelle,Attias, André-Jean
, p. 5879 - 5882 (2003)
This paper describes a general approach for the synthesis of conjugated 6,6′-disubstituted-3,3′-bipyridine chromophores. As preliminary results, 6-(4-hexyl-2-thienylvinylene)-5-methyl-3-bromopyridine, 6-(4-ethanol-2-thienylvinylene)-5-methyl-3-bromopyridine, and the corresponding 3-pyridinylboronic esters have been prepared. Coupled by Suzuki reaction, they gave the conjugated chromophores (I) and (II) in high yields and multigram scales.
Packing and thin-film structures of 5,7,12,14-tetra(α-alkylthienylethyl)pentacenes
Makino, Hiroki,Sato, Shin,Yoshino, Junro,Hayashi, Naoto,Okada, Hiroyuki
, p. 1154 - 1169 (2019/08/01)
Four 5,7,12,14-tetra(thienylethynyl)pentacenes (2-5) bearing H, Me, C5H11, and C6H13 groups at the α-positions of the thienyl groups were synthesized. The α-alkylthienyl groups enhanced solubilities of 2-5, whereas their ultraviolet/visible spectra were virtually identical. X-Ray diffraction revealed that the packing structure of 4 and 5 were significantly different because of one methylene group in each alkyl group. The thin-film structure of 4 was amorphous, while that of 5 consisted of small crystalline needles. Neither 4 nor 5 behaved as organic field-effect transistors because of inadequate packing and thin-film structure.
FORMYLTHIOPHENES AND THEIR USE IN FLAVOR AND FRAGRANCE COMPOSITIONS
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Page/Page column 21; 22, (2017/05/19)
The present invention is directed to novel organoleptic compounds, a process of augmenting, enhancing or imparting taste to a material selected from the group consisting of a foodstuff, a chewing gum, a dental product, an oral hygiene product and a medicinal product comprising the step of incorporating an olfactory acceptable amount of such novel organoleptic compounds, and a process of improving, enhancing or modifying a fragrance formulation through the addition of an olfactory acceptable amount of such novel organoleptic compounds.
Use of compounds comprising a piperazine structural element in organic electronic devices and compounds and polymers comprising a piperazine structural element
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Page/Page column, (2015/07/02)
Use of compounds comprising at least one of structural elements (1) to (5) or of oligomers or polymers comprising units obtained from compounds of formulas (1) to (5 as organic semiconductors in organic electronic devices.
