Three new photochromic lactones closely related to an indolylfulgide were synthesized. While the lactones with the carbonyl group adjacent to the isopropylidene group have large quantum yields of photoreactions, the isomer with the carbonyl adjacent to the indolylethylidene group showed poor photochromic properties. The absorption maxima of the colored forms of the lactones are shorter than that of the indolylfulgide.
我们合成了三种与一种
吲哚富甙密切相关的新型光致变色内酯。羰基与异亚丙基相邻的内酯具有较大的光反应量子产率,而羰基与
吲哚亚乙基相邻的异构体的光致变色性能较差。有色内酯的吸收最大值比
吲哚乙酰基的吸收最大值短。