Various photochromic materials are provided that are essentially free of polymerizable unsaturated groups, and comprise:
a) an indeno[2′,3′:3,4]naphtho[1,2-b]pyran; and
b) an electron-withdrawing, non-conjugating group bonded at the 11-position of the indeno[2′,3′:3,4]naphtho[1,2-b]pyran.
Alternative embodiments include various substituents at other positions of the indeno[2′,3′:3,4]naphtho[1,2-b]pyran.
Also provided are photochromic articles including a substrate and one of the above photochromic materials, in contact with at least a portion of the substrate.
提供了各种光致变色材料,基本上不含聚合可不饱和基团,并包括:a)一种
吲哚并[2′,3′:3,4]
萘[1,2-b]
吡喃;和b)与
吲哚并[2′,3′:3,4]
萘[1,2-b]
吡喃的11位键合的电子吸引、非共轭基团。另外的实施方式包括在
吲哚并[2′,3′:3,4]
萘[1,2-b]
吡喃的其他位置上的各种取代基。还提供了光致变色物品,包括基板和上述光致变色材料之一,与基板的至少一部分接触。