Patent ID: 8545996

Claim:
A compound comprising the formula: ∑ i = 1 m ⁢ C i ai + ⁢ ∑ j = 1 n ⁢ C j bj - , wherein C i ai+ is an organometallic cation having formula C i with a i positive charge; wherein C j bj+ is an organometallic anion having formula C j with b j negative charge; wherein formula C i is (L i ) f M i X i ; formula C j is (L j ) g M j X j ; wherein each of M i and M j is independently a transition metal or a lanthanide; wherein each of L i and L j is independently a mono-, di-, tri- or polydentate ligand; wherein each of f and g may represent 2 or 3; wherein X i and X j represent any number of chelated or auxiliary ligands; wherein ∑ i = 1 m ⁢ a i = ∑ j = 1 n ⁢ b j ; and wherein m and n are integers of 1 to 20; wherein the organometallic anion is selected from the group consisting of: wherein the organometallic cation is selected from the group consisting of: