abstract |
The present application relates to a compound of formula Ai Xi where Ai is an organic onium cation; and Xi is an anion of the formula X-CF2CF2OCF2CF2-SO3-. The compounds are useful as photoactive materials. Ai is selected from formula (I) and Y-Ar, where Ar is selected from formula (II), naphthyl or anthryl; Y is selected from formula (III), (IV) and (V). |