A photochromic material having a ring opening quantum yield of 10
−3
or lower which does not fade under ambient light is provided. The material comprises a compound belonging to the diheteroarylethene class. The compound has alkoxy group and aryl group on the heteroaryl group.
提供一种具有环开放量子产率为10^-3或更低且不会在常温光线下褪色的光致变色材料。该材料包括属于二杂环
乙烯类的化合物。该化合物在杂环基上具有烷氧基和芳基。