Sensitizer dyes for photoacid generating systems

A dye represented by Structural Formula (I):

• wherein:
• R1 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, or —Si(R5)3;
• R2, R3, and R4 are each independently —H, a halogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkylethynyl group, a substituted or unsubstituted alkenylethynyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, or the group —C≡C—Si(R5)3;
• each R5 is independently a substituted or unsubstituted alkyl, a substituted or unsubstituted aryl or a substituted or unsubstituted heteroaryl group;
• and rings A and B are independently substituted or unsubstituted.