Patent ID: 7153956

Claim:
A IR-absorbing dye of formula (I) or (II) wherein R 10 , R 13 , R 20 , R 23 , R 30 , R 33 , R 40 and R 43 are independently selected from a C 1-12 alkyl group bearing a hydroxyl or protected hydroxyl group; each of R 11 /R 12 , R 21 /R 22 , R 31 /R 32 , and R 41 /R 42 are together joined form T is selected from a substituent comprising a polymeric chain or a C 1-30 hydrocarbyl group; W is —SO 3 H or a water-soluble salt thereof; m is 0, 1 or 2; n is 0, 1 or 2; M is selected from Si(A 1 )(A 2 ), Ge(A 1 )(A 2 ), Ga(A 1 ), Mg, Al(A 1 ), TiO, Ti(A 1 )(A 2 ), ZrO, Zr(A 1 )(A 2 ), VO, V(A 1 )(A 2 ), Mn, Mn(A 1 ), Fe, Fe(A 1 ), Co, Ni, Cu, Zn, Sn, Sn(A 1 )(A 2 ), Pb, Pb(A 1 )(A 2 ), Pd and Pt; A 1 and A 2 are axial ligands, which may be the same or different, and are selected from OH, halogen or OR 3 ; R 3 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.