Patent ID: 7829342

Claim:
A composition, comprising: a complex having a structural formula selected from the group consisting of I, its (R,R) enantiomer and mixtures thereof; where M is a metal, L 1 and L 2 are ancillary ligands, X is a counterion, n is 2 or 3, R 1 , R 2 , R 7 and R 8 independently are selected from the group consisting of an alkyl group, a heteroalkyl group, an aryl group and a heteroaryl group, R 3 , R 4 , R 5 and R 6 independently are selected from the group consisting of hydrogen, a halide group, an alkyl group, a heteroalkyl group, an aryl group and a heteroaryl group, R 9 and R 10 independently are selected from the group consisting of hydrogen, a halide group, an alkyl group, a heteroalkyl group, an aryl group, a heteroaryl group, a nitro group, and a group linking the complex to a surface; and where C A and N A , in combination with at least one pair of groups selected from the group consisting of R 1 and R 3 , R 1 and R 4 , R 2 and R 3 , and R 2 and R 4 , form at least one ring.