Patent ID: 7462720

Claim:
A compound having the formula: wherein L 1 and L 2 are each independently C 1 -C 20 alkyl group substituted with an imidazolyl group, wherein each imidazolyl group of L 1 and L 2 is bonded to a transition metal compound of the formula: wherein M is a metallic element that can form a coordinate bond to nitrogen; R and R′ are nitrogen-containing organic moieties coordinated to M at their nitrogen atoms, wherein R and R′ are independently selected from the group consisting of 2,2′-bipyridyl; 2,2′-bipyridyl substituted with one or more substituents selected from the group consisting of C 1 -C 4 alkyl, phenyl, and phenyl substituted with one or more C 1 -C 4 alkyl groups; 1,10-phenanthrolinyl; and 1,10-phenanthrolinyl substituted with one or more substituents selected from the group consisting of C 1 -C 4 alkyl, phenyl, and phenyl substituted with one or more C 1 -C 4 alkyl groups; Z is a halogen atom; m is +1, +2, +3, +4, +5, or +6; and X is an anion, or combination of anions, that balances m.