Substrate having dye with dendrimer axial ligands disposed thereon

摘要

A substrate having an IR-absorbing metal-cyanine dye disposed thereon. The dye is a metal-cyanine complex of formula (I): with axial ligands of formula (III): wherein: C1 represents a core unit having two or more branching positions; each P1 is independently selected from H or a hydrophilic moiety; g1 is an integer from 2 to 8; q1 is 0 or an integer from 1 to 6; and each p1 is independently selected from 0 or an integer from 1 to 6.