Patent ID: 8444834

Claim:
A redox polymer comprising (a) a polymeric backbone; (b) a cross-linker; and (c) a transition metal complex having the following formula: wherein (i) M is osmium; and (ii) L is selected from the group consisting of: wherein: R 1 , R 2 , and R′ 1 are independently substituted or unsubstituted alkyl, alkenyl, or aryl groups; R 3 , R 4 , R 5 , R 6 , R′ 3 , R′ 4 , R a , R b , R c , and R d are independently —H, —F, —Cl, —Br, —I, —NO 2 , —CN, —CO 2 H, —SO 3 H, —NHNH 2 , —SH, aryl, alkoxycarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl, —OH, alkoxy, —NH 2 , alkylamino, dialkylamino, alkanoylamino, arylcarboxamido, hydrazino, alkylhydrazino, hydroxylamino, alkoxyamino, alkylthio, alkenyl, aryl, or alkyl; c is an integer selected from −1 to −5 or +1 to +5 indicating a positive or negative charge; X represents at least one counter ion; d is an integer from 1 to 5 representing the number of counter ions; and L 1 , L 2 , L 3 and L 4 are ligands, wherein L 1 comprises a heterocyclic compound coupled to the polymeric backbone; and wherein L 1 and L 2 in combination form a first bidentate ligand.