Thermally irreversible photochromic systems. Reversible photocyclization of 1, 2-bis (thiazolyl) perfluorocyclopentenes

K Uchida, T Ishikawa, M Takeshita, M Irie

Index: Uchida, Kingo; Ishikawa, Takayuki; Takeshita, Michinori; Irie, Masahiro Tetrahedron, 1998 , vol. 54, # 24 p. 6627 - 6638

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Citation Number: 114

Abstract

Diarylethenes having thiazole rings, 1, 2-bis (thiazol-4′-yl) perfluorocyclopentenes and 1, 2- bis (thiazol-5′-yl) perfluorocyclopentenes, were synthesized. The binding positions of the thiazole rings to the perfluorocyclopentene moiety strongly affected the absorption spectra. The absorption maxima of the open-and closed-ring forms of 1, 2-bis (5′-methyl-2′- phenylthiazol-4′-yl) perfluorocyclopentene were observed at 300 nm and 525 nm, ...