Patent ID: 8795422

Claim:
A naphthalocyanine dye represented by one of the general structures I to XV: wherein: R 1 is H or an alkyl group or a substituted alkyl group or X 1 ; R 2 is, independently, Na, H, an alkyl group or a substituted alkyl group containing from 1 to 20 carbon atoms; or an aryl group or a substituted aryl group with a maximum of 5 benzene units; R 3 is, independently, NH 2 , SH, an alkyl group or a substituted alkyl group containing from 1 to 20 carbons atoms; or an aryl group or a substituted aryl group with a maximum of 5 benzene units; M is a monovalent, a divalent, a trivalent, a tetravalent or a pentavalent metal ion or transition metal ion; X and X 1 are, independently, selected from the group consisting of OH, OCOR, COOZ, SO 3 Z, PO 3 Z 2 , NR 3 + Y − , and (CH 2 CH 2 O) m CH 3 , wherein Z is independently selected from the group consisting of H, a monovalent metal ion, and NR 4 + ; wherein R is independently selected from the group consisting of H, an alkyl group, a substituted alkyl group, an aryl group and a substituted aryl group; wherein Y is independently selected from the group consisting of a halogen, sulfate, sulfonate, OH, OSO 3 Z, and OCOR, and wherein m ranges from 1 to 500.