Patent ID: 7063903

Claim:
A lanthanide compound comprising Formula XIV below: Ln(β-enolate) 3 (phosphine oxide-pyridine N-oxide) 1 (XIV) where in Formula (XIV): phosphine oxide-pyridine N-oxide has Formula VII such that: in Formula VII: Y is the same or different at each occurrence and is selected from —CN, —OR 1 , —OH, —C(O)OR 1 , —R f , aryl, X, —NO 2 , and —SO 2 R 1 , R 1 is C s H 2s+1 , R f is C s F 2s+1 , X is F, Cl, Br, or I, s is an integer from 1 to 6, β is 0 or an integer from 1 to 4, m is 0 or an integer from 1–12, and Q is the same or different at each occurrence and is selected from C 6 H n F 5−n , and C m (H+F) 2m+1 , where m is an integer from 1 to 12, and n is an 0 or an integer from 1 to 5.