Infrared absorber dyes

摘要

A photographic element having a light sensitive layer and containing a dye of the formula (I): (I) +TR wherein: X1 and X2 each independently represents the atoms necessary to complete a 5- or 6-membered heterocyclic nucleus; X3 represents the atoms necessary to form a 5- or 6-membered ring structure, which may be substituted; R1 and R2 each independently represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; R3 represents H, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; r and s independently are 0 or 1; and W represents one or more counterions as needed to balance the charge of the molecule.