Patent ID: 7119204

Claim:
A phenanthroline compound having Formula I, wherein: R 1 and R 2 are the same or different at each occurrence and are selected from H, F, Cl, Br, alkyl, heteroalkyl, alkenyl, alkynyl, substituted aryl, heteroaryl, C n H a F b , OC n H a F b , C 6 H c F d , and OC 6 H c F d; a, b, c, and d are 0 or an integer such that a+b=2n+1, and c+d=5, n is 1–20; x is an integer from 1 through 3; y is 0, 1 or 2; wherein at least one R1 is selected from substituted phenyl and substituted biphenyl having at least one substituent selected from CnHaFb, OCnHaFb, C6HcFd, and OC6HcFd, wherein b and d are integers.