Effects of Steric Bulkiness of Substituents on Quantum Yields of Photochromic Reactions of Furylfulgides
作者:Yasushi Yokoyama、Tetsushi Inoue、Masato Yokoyama、Takakazu Goto、Takeshi Iwai、Naohiko Kera、Isamu Hitomi、Yukio Kurita
DOI:10.1246/bcsj.67.3297
日期:1994.12
Furylfulgides with different sizes of alkyl substituents were synthesized and their photochromic properties were examined. While the quantum yield of coloring reaction increased and the quantum yield of the E-to-Z isomerization decreased as the steric bulkiness of the alkyl substitutent on the 2,5-dimethyl-3-furylmethylidene moiety increased, the bleaching quantum yield increased as the isopropylidene
合成了具有不同大小烷基取代基的呋喃磺酰氯并检测了它们的光致变色性能。虽然随着 2,5-二甲基-3-呋喃亚甲基部分上烷基取代基的空间体积增加,着色反应的量子产率增加,E-to-Z 异构化的量子产率降低,但漂白量子产率随着异亚丙基被金刚烷基取代。两种效应独立起作用,并且在一个分子中具有异丙基的呋喃亚甲基部分和金刚烷亚基的呋喃酰氟酸在甲苯中显示出 0.51 (366 nm) 的着色量子产率和 0.26 (492 nm) 的漂白量子产率。