Patent ID: 8507905

Claim:
A composition comprising a lanthanide-containing precursor of the general formula: Ln(R 1 Cp) m (R 2 —N—C(R 4 )═N—R 2 ) n , wherein: Ln is a lanthanide metal having an ionic radius from approximately 0.75 {acute over (Å)} to approximately 0.94 {acute over (Å)}, a 3+ charge, and a coordination number of 6; R 1 is selected from the group consisting of H and a C1-C5 alkyl chain; R 2 is selected from the group consisting of H and a C1-C5 alkyl chain; R 4 is selected from the group consisting of H and Me; n and m range from 1 to 2; and the precursor has a melting point below approximately 105° C.