Patent ID: 8174185

Claim:
A compound having Formula I: wherein: R 1 , and R 3 through R 5 are the same or different at each occurrence and are independently selected from the group consisting of hydrogen, alkyl, aryl, halogen, hydroxyl, aryloxy, alkoxy, alkenyl, alkynyl, amino, alkylthio, phosphino, silyl, —COR, —COOR, —PO 3 R 2 , —OPO 3 R 2 , and CN; R 6 is selected from the group consisting of hydrogen, alkyl, aryl, alkylaryl, and arylalkyl; R is the same or different at each occurrence and is independently selected from the group consisting of hydrogen, alkyl, aryl, alkenyl, and alkynyl; and n is an integer from 0-3; and R 2 is aryl.