Patent ID: 8420440

Claim:
A compound of Formula (I): wherein X is O, S, or N—R 3 ; A is O or S; Y is O or S; Z is O, S, N, or C; each Ar is independently aryl, substituted aryl, heteroaryl, or substituted heteroaryl; each n is independently from 0 to about 2; m is the number of R 2 sidechains and is an integer from 1 to 3; R 1 and R 3 are independently hydrogen, alkyl, substituted alkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, alkoxy, alkylthio, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, trialkylsilyl, arylalkyl, alkylaryl, or halogen; and each R 2 is independently hydrogen, alkyl, substituted alkyl, aryl, or substituted aryl.