	US 7,452,989 B2
	Metal-cyanine dye having improved water solubility
Simone Charlotte Vonwiller, Balmain (Australia); Scott Matthew Starling, Balmain (Australia); Damon Donald Ridley, Balmain (Australia); Lachlan Everett Hall, Balmain (Australia); Simon Fielder, Balmain (Australia); Maxine Sintic, Balmain (Australia); Sutharsiny Indusegaram, Balmain (Australia); Kia Silverbrook, Balmain (Australia); and Paul Lapstun, Balmain (Australia)
Assigned to Silverbrook Research Pty Ltd, Balmain, New South Wales (Australia)
Filed on Aug. 09, 2004, as Appl. No. 10/913,374.
Prior Publication US 2006/0027138 A1, Feb. 09, 2006
Int. Cl. C07B 47/00 (2006.01); C09D 11/00 (2006.01)

U.S. Cl. 540—145 [106/31.13]

11 Claims

1. An IR-absorbing dye which is a metal-cyanine complex of formula (I):

wherein

Q¹, Q², Q³and Q⁴are the same or different and are independently selected from a C_3-20arylene group or a C_3-20heteroarylene group;

M is selected from Ti(A¹)(A²), Zr(A¹)(A²), V(A¹)(A²), Si(A¹)(A²), Ge(A¹)(A²), Ga(A¹), Al(A¹), Mn(A¹), Fe(A¹), Sn(A¹)(A²), or Pb(A¹)(A²); and

A¹and A²may be the same or different and are axial ligands of formula (IIIa)

wherein:

C¹represents a core unit having two or more branching position;

each P¹is independently selected from H, a hydrophilic moiety or a branched moiety;

g¹is an integer from 2 to 8;

q¹is 0 or an integer from 1 to 6; and

each p¹is independently selected from 0 or an integer from 1 to 6.