Thermally irreversible photochromic systems. Reversible photocyclization of 1, 2-diselenenylethene and 1, 2-diindolylethene derivatives

Y Nakayama, K Hayashi, M Irie

Index: Nakayama, Yasuhide; Hayashi, Koichiro; Irie, Masahiro Journal of Organic Chemistry, 1990 , vol. 55, # 9 p. 2592 - 2596

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Citation Number: 120

Abstract

Diarylethene derivatives with selenophene or indole rings were synthesized in an attempt to obtain thermally stable photochromic compounds having the absorption bands at longer wavelengths and to confirm our previous theoretical prediction for molecular design of thermally irreversible photochromic compounds. The absorption maxima of the closed-ring forms of 2, 3-bis (2, 4, 5-trimethyl-3-selenenyl) maleic anhydride (6) and 2, 3-bis (1, 2- ...