Synthesis and photochromic mechanism of   3,4-bis[2,5-dimethylthiophene-3-yl]-2,5-dihydrothiophene

doi:10.1016/S1010-6030(97)00163-9

CORC > 北京大学 > 化学与分子工程学院

	Synthesis and photochromic mechanism of 3,4-bis[2,5-dimethylthiophene-3-yl]-2,5-dihydrothiophene
	Xu, BA ; Huang, ZN ; Jin, S ; Ming, YF ; Fan, MG ; Yao, SD
刊名	journal of photochemistry and photobiology a chemistry
	1997
关键词	3,4-bis[2,5-dimethylthiophene-3-yl]-2,5-dihydrothiophene photochromism transient absorption spectra laser photolysis REVERSIBLE PHOTOCYCLIZATION DIARYLETHENE DERIVATIVES SYSTEMS
DOI	10.1016/S1010-6030(97)00163-9
英文摘要	A novel photochromic compound, 3,4-bis[2,5-dimethylthiophene-3-yl]-2,5-dihydrothiophene (BT), has been synthesized. The photochromic reactions of BT in a polar solvent (acetonitrile) and a non-polar solvent (cyclohexane) were investigated by means of steady state absorption spectra and time-resolved transient absorption spectra. The maximum absorption wavelengths of BT in acetonitrile and cyclohexane are at 232 and 233 nm, respectively, and the maximum absorption wavelengths of the photocyclization product (CBT) in acetonitrile and cyclohexane are 445 and 453 nm, respectively. Upon irradiation with ultraviolet light, BT is first excited to the excited singlet state, and then to the excited triplet state via inter-system crossing. Only the excited singlet state generates CBT. The excited tripler state, which has maximum absorption wavelength at 390 nm, decays rapidly to the starting compound (BT) alone. (C) 1997 Elsevier Science S.A.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1997YF95700006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Physical; SCI(E); 10; ARTICLE; 1; 35-40; 110
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/257912]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Xu, BA,Huang, ZN,Jin, S,et al. Synthesis and photochromic mechanism of 3,4-bis[2,5-dimethylthiophene-3-yl]-2,5-dihydrothiophene[J]. journal of photochemistry and photobiology a chemistry,1997.
APA	Xu, BA,Huang, ZN,Jin, S,Ming, YF,Fan, MG,&Yao, SD.(1997).Synthesis and photochromic mechanism of 3,4-bis[2,5-dimethylthiophene-3-yl]-2,5-dihydrothiophene.journal of photochemistry and photobiology a chemistry.
MLA	Xu, BA,et al."Synthesis and photochromic mechanism of 3,4-bis[2,5-dimethylthiophene-3-yl]-2,5-dihydrothiophene".journal of photochemistry and photobiology a chemistry (1997).