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23 January 2006 Photochromism and optical recording in polymer film containing asymmetrical dithienylethene compounds
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Proceedings Volume 6029, ICO20: Materials and Nanostructures; 602910 (2006)
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China
Two novel photochromic dithienylethenes, [1-(2-methyl-5-p- methylphenyl-thien-3-yl)-2-(2-methyl-5(4-(1,3-dioxolane) phenyl)- thien-3-yl)]perfluorocyclopentene (DTE-1) and [1-(2-methyl-5-(3- thienyl)-thien-3-yl)-2-(2-methyl-5(4-(1,3- dioxolane)phenyl)-thien-3-yl)]perfluorocyclopentene (DTE-2), were synthesized and their photochemical properties, such as photochromism and fluorescence were investigated. DTE-1 and DTE-2 have shown good photochromic behavior. Upon irradiation with 254 nm UV light, their color changed from colorless to blue, in which absorption maxima were observed at 590 nm and 592 nm in CH2Cl2. DTE-1 and DTE-2 also showed relatively strong fluorescence in different solvents when excited at 295 nm. While, their fluorescence spectra showed remarkable concentration dependence. In addition, near-field recording using DTE-1 as recording medium was performed successfully.
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Tianshe Yang, Shouzhi Pu, Liang Shen, Bing Chen, Jingkun Xu, and Qiang Xiao "Photochromism and optical recording in polymer film containing asymmetrical dithienylethene compounds", Proc. SPIE 6029, ICO20: Materials and Nanostructures, 602910 (23 January 2006);

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