Patent ID: 7645558

Claim:
A photochromic material represented by the general formula (I) wherein: each X independently represents hydrogen, an alkyl chain having 1 to 20 carbon atoms, bromine, chlorine or an iodine atom, A represents a group of formula (a)-(c), and B represents a group of formula (d)-(f), wherein: R 4 represents an aryloxy group, a substituted and unsubstituted heteroaromatic group, an alkoxy group, or a substituted alkoxy group, where the alkyl portion of the alkoxy group represents a straight, branched or cyclic, substituted or unsubstituted, alkyl group of from 1 to about 40 carbon atoms, R 5 represents an aryl group, a substituted or unsubstituted alkylaryl group wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl group, a cyano group, a carboxylic acid group, or an unsaturated alkene group, R 6 represents a hydrogen atom, an alkyl group, a halogen atom, an alkoxy group, a fluoroalkyl group, a cyano group, an aryl group, or a substituted alkylaryl group, R 7 represents an alkyl group, an aryl group, an alkylaryl group including substituted alkylaryl groups, unsubstituted alkylaryl groups, and wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl, R 8 represents an aryloxy group, substituted and unsubstituted heteroaromatic group, or an alkoxy group or substituted alkoxy group where the alkyl portion of the alkoxy group represents a straight, branched or cyclic, substituted or unsubstituted, alkyl group of from 1 to about 40 carbon atoms, R 9 represents an aryl group, a substituted or unsubstituted alkylaryl groups wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl group, a cyano group, a carboxylic acid group, or an unsaturated alkene group, R 10 represents a hydrogen atom, an alkyl group, a halogen atom, an alkoxy group, a fluoroalkyl group, a cyano group, an aryl group, or a substituted alkylaryl group, R 11 represents an alkyl group, an aryl group, or a substituted or unsubstituted alkylaryl group wherein hetero atoms either may or may not be present in the alkyl portion of the alkylaryl group or the aryl portion of the alkylaryl, and U and Z each independently represent sulfur or oxygen atoms.