Patent ID: 6884891

Claim:
A compound represented by formula (1): Dye1-(L 1 -(Dye2) m1 ) m2 (CI 1 ) y1 (1) wherein L 1 represents a linkage group represented by formula (2), m1 represents an integer of 1 to 5, m2 represents an integer of 1 to 5, Dye1 represents a first chromophore, Dye 2 represents a second chromophore, CI 1 represents an ion for neutralization of electric charge, and y1 represents a number of the ions required for neutralization of electric charges; -G 1 -A 1 -Y 1 -G 2 -Y 2 -A 2 -G 3 - (2) wherein A 1 and A 2 each individually represent a carbonyl group or a sulfonyl group, Y 1 and Y 2 each individually represent —O—, —S— or —NR 1 —, R 1 represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or a heterocyclic group, and G 1 , G 2 and G 3 each individually represent a divalent linkage group, and wherein both Dye1 and Dye2 are cyanine or merocyanine chromophores which each have at least one benzoxazole nucleus.