abstract |
The present invention relates to a compound of formula AXB, wherein (i) AXB is an ionic compound Ai Xi Bi (wherein Ai and Bi are each independently an organic onium cation; Xi is an anion of formula QR 500 -SO 3 Or (ii) AXB forms a nonionic compound Ac-Xc-Bc, wherein Ai, Bi, Q, R 500 , Ac, Bc, and Xc are defined herein. The compounds are useful as photoactive materials. |