Patent ID: 8362463

Claim:
A complex having the formula: [Y 2 M-O-] n -CT wherein: M is a metal in a +2, +3, or +4 oxidation state; Y is, independently at each occurrence, an hydroxyaryl-N-heterocycle, a bidentate Schiff base ligand, or both Y together form a tetradentate Schiff base ligand; n is an integer from 1 to 4; and CT is a charge transport group selected from oxadiazole, phenanthroline, quinoxaline, [(3,6-di(N-(4-hydroxycarbazole)dibenzothiophene), and wherein: R 5 is, independently, H or alkyl; R 6 is NR 7 R 8 ; and R 7 and R 8 are, independently, alkyl or aryl, or R 7 and R 8 cooperate to form aryl.