Patent ID: 8383553

Claim:
A compound, comprising a complex formula (Ia): MX 3 L (Ia) wherein M is a transition metal ion; each X, independently, is a monodentate ligand selected from the group consisting of thiocyanate, isothiocyanate, and pyridine optionally substituted with halo, C 1 -C 20 alkoxy, C 1 -C 20 alkyl, C 2 -C 20 alkenyl, C 2 -C 20 alkynyl, C 3 -C 20 cycloalkyl, C 3 -C 20 cycloalkenyl, C 1 -C 20 heterocycloalkyl, C 1 -C 20 heterocycloalkenyl, aryl, or heteroaryl; and L is a tridentate ligand of formula (II): in which R 6 is in which n is 1, 2, or 3; m is 1, 2, or 3; and each R, independently, is COOH, PO 3 H, and each of R 1 , R 2 , R 3 , R 4 , R 5 , R 7 , R 8 , R 9 , R 10 , and R 11 , independently, is H, COOH, PO 3 H, halo, C 1 -C 20 alkoxy, C 1 -C 20 alkyl, C 2 -C 20 alkenyl, C 2 -C 20 alkynyl, C 3 -C 20 cycloalkyl, C 3 -C 20 cycloalkenyl, C 1 -C 20 heterocycloalkyl, C 1 -C 20 heterocycloalkenyl, aryl, heteroaryl, alkenylaryl, alkynylaryl, alkenylheteroaryl, or alkynylheteroaryl.