Photochromic materials which have a structure which includes a spiro-pyrrolidinebenzoxazine structure comprising a pyrrolidine part and a benzoxazine part and the benzoxazine part includes at least one mesomeric electron donating group chosen from amino and alkoxy moieties, the one or more mesomeric electron donating groups being linked to the 6' position via attachment to a conjugated system in which the unsaturated bonds forming the linkage are chosen from -C=C-, -C≡C-, -C=N- and -N=N-.
光致变色材料,其结构包括由
吡咯烷部分和苯并噁嗪部分组成的螺-
吡咯烷-苯并噁嗪结构,苯并噁嗪部分包括至少一个介构电子供体,该介构电子供体选自
氨基和烷氧基、一个或多个中间体电子供体基团通过与共轭体系连接到 6'位置,其中形成连接的不饱和键选自-C=C-、-C≡C-、-C=N-和-N=N-。