| abstract |
A photostabilized photoactive composition comprising a mixture of a photoactive compound that develops a singlet excited state, or fluoresces when subjected to UV radiation and an effective amount of an excited state quencher comprising a cyano-containing fused tricyclic compound of formula (I): n n n n n n n n n n n n wherein: n A is selected from the group consisting of O, S, C═O, and n n n n n n n n n n n n n n n n n is selected from the group consisting of 0 and 1; and, n R 1 and R 2 are each independently selected from the group consisting of alkyl, cycloalkyl, ether, aryl, and amino. |