Cyanine dye having multifunctional peripreral groups

摘要

The present invention provides an IR-absorbing dye of formula (I) or (II) wherein R¹⁰, R¹³, R²⁰, R²³, R³⁰, R³³, R⁴⁰ and R⁴³ are independently selected from a C_1-12 alkyl group bearing a hydrophilic or hydrophilizable group; R¹¹, R¹², R²¹, R²², R³¹, R³², R⁴¹ and R⁴² are independently selected from H or a C_1-30 hydrocarbyl group, or each of R¹¹/R¹², R²¹/R²², R³¹/R³², and R⁴¹/R⁴² are together joined to form a C_3-30 hydrocarbylene group; M is selected from Si(A¹)(A²), Ge(A¹)(A²), Ga(A¹), Mg, Al(A¹), TiO, Ti(A¹)(A²), ZrO, Zr(A¹)(A²), VO, V(A¹)(A²), Mn, Mn(A¹), Fe, Fe(A¹), Co, Ni, Cu, Zn, Sn, Sn(A¹)(A²), Pb, Pb(A¹)(A²), Pd and Pt; A¹ and A² are axial ligands, which may be the same or different, and are selected from -OH, halogen, -OR³, a hydrophilic ligand and/or a ligand suitable for reducing intermolecular interactions; R³ is a selected from C_1-12 alkyl, C_5-12 aryl, C_5-12 arylalkyl or Si(R^x)(R^y)(R^z); and R^x, R^y and R^z may be the same or different and are selected from C_1-12 alkyl, C_5-12 aryl, C_5-12 arylalkyl, C_1-12 alkoxy, C_5-12 aryloxy or C_5-12 arylalkoxy. Dyes of this type are especially suitable for use in netpage and Hyperlabel systems.