Described are photochromic 2H-naphtho[1,2-] pyrans characterized by having an aromatic substituent in the 5 position. The aromatic group at 5-position of the naphthopyran is a substituted or unsubstituted aryl group or other substituted or unsubstituted aromatic group. These compounds may be represented by the following graphic formula:
1
Also described are polymeric organic host materials that contain or that are coated with such compounds.
所描述的是光致变色 2H-
萘并lsqb;1,2-并rsqb;
吡喃,其特征在于 5 位上有一个芳香取代基。
萘并
吡喃 5 位上的芳香基团是取代或未取代的芳基或其他取代或未取代的芳香基团。这些化合物可用下式表示:
1
还描述了含有或包覆有此类化合物的聚合物有机主材料。