Thermally Irreversible Photochromic Systems. Reversible Photocyclization of 1,2-Bis(benzo[<i>b</i>]thiophen-3-yl)ethene Derivatives
作者:Kingo Uchida、Yasuhide Nakayama、Masahiro Irie
DOI:10.1246/bcsj.63.1311
日期:1990.5
1,2-Bis(benzo[b]thiophen-3-yl)ethene derivatives, which possess thermally irreversible and fatigue resistant photochromic properties, were synthesized, cis-1,2-Dicyano-1,2-bis(2-methylbenzo[b]thiophen-3-yl)ethene 1a and 2,3-bis(2-methylbenzo[b]thiophen-3-yl)maleic anhydride 2a underwent reversible photocyclization to produce red-colored closed-ring forms with λmax at 507 nm and 544 nm, respectively