| abstract |
The present invention is concerned with compounds represented by the following formulas (I) and (II), (see Formulas) ring A of formulas I and II can be for example an aryl group and Q´ and Q´´´ can each be independently selected from groups such as halogen, -OH, -CN, amine groups, amide groups, carboxylic acid ester groups, carboxylic acid groups, alkenyl groups, alkynyl groups, carbonate groups, sulfide groups and sulfonic acid ester groups . The present invention is also concerning photochromic compositions and photochromic articles that include one or more photochromic compounds, such as those represented by formula II. |