| abstract |
An acid generating agent useful for imaging photosensitive elements, the acid generating agent having formula (I), (II) or (III) wherein: R1 an unsubstituted or substituted hydrocarbon or aryl group, X is oxygen, sulfur or selenium; Y is sulfur, selenium or tellurium; Ar1 is an unsubstituted or substituted aryl group; R2, R3 and R4 are each independently an unsubstituted or substituted hydrocarbon or aryl group, or any two of R2, R3 and R4 are bonded together to form a ring structure; and R5 and R6 are each independently selected an unsubstituted or substituted hydrocarbon or aryl group, or R5 and R6 are bonded to each other to form a ring structure. |