西安理工大学学报2025，Vol.41Issue(1)：134-140,7.DOI:10.19322/j.cnki.issn.1006-4710.2025.01.013
一个含联吡啶的螯合二噻吩乙烯新配体合成、结构和光致变色性质研究
A new chelating dithienylethene ligand containing bipyridyl:syntheses,structures and photochromism
摘要
Abstract
In order to improve the conversion of photo-induced cyclization of dithienylethenes and extend the excitation wavelength of photo-induced conversion for low-energy read-out,a new che-lating ligand containing bipyridyl 1,2-bis-[2'-methyl-5'-(5″-bipyridyl)-3'-thienyl]perfluorocyclo-pentene(BM-5-BP-3-TP)as well as its closed-ring isomer(closed-BM-5-BP-3-TP)were designed and synthesized firstly for realization of further modulation their photochromism by self-assembly of the ligand with metal ions into Metal-Organic Frameworks.The structures of intermediate 3-bromo-2-methyl-5-(5'-bipyridyl)thiophene(BM-5-BPT)and BM-5-BP-3-TP were characterized by IR,1 HNMR,MS and EA.The photochromism and polarity dependence of BM-5-BP-3-TP in varied solvent were investigated by UV-Vis spectroscopy.The maximum absorption wavelength of the closed-ring isomer in MeOH is 612 nm.The photo-isomerization kinetics indicated that the photo-cyclization belongs to zeroth-order process whereas the photo-conversion follows a first-order process.BM-5-BP-3-TP showed reversible photochromism in both PMMA films and crys-talline phase withλmax at 608 nm and 614 nm,respectively.It exhibited excellent fatigue resist-ance in PMMA films.关键词
二噻吩乙烯/螯合配体/光致变色/光反应动力学/晶体相/光疲劳Key words
dithienylethene/chelating ligand/photochromism/photo-isomerization kinetics/crystalline phase/photo-fatigue resistance分类
化学引用本文复制引用
余中,陈怡璇,杨键,韩晶..一个含联吡啶的螯合二噻吩乙烯新配体合成、结构和光致变色性质研究[J].西安理工大学学报,2025,41(1):134-140,7.基金项目
教育部留学回国人员启动基金 （）
陕西省教育厅科学研究计划项目(12JK0614) （12JK0614）
陕西省科技厅重点研发计划项目(2018PT-27,2018GY-125,2019NY-201) （2018PT-27,2018GY-125,2019NY-201）
西安理工大学校基金项目(109-400210929) （109-400210929）
