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
合成了具有热不可逆性和抗疲劳光致变色性能的 1,2-双(苯并[b]噻吩-3-基)乙烯衍生物,cis-1,2-Dicyano-1,2-bis(2-methylbenzo[ b]噻吩-3-基)乙烯 1a 和 2,3-双(2-甲基苯并[b]噻吩-3-基)马来酸酐 2a 经历可逆光环化,产生红色闭环形式,λmax 在 507 nm 和分别为 544 nm。闭环形式在 80 °C 下可稳定超过 3 周。在保持足够的光致变色性能的情况下,着色/脱色(闭环/开环)循环能够重复超过 104 次。