Patent ID: 8377573

Claim:
A compound of formula (1): wherein Ar is a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group; R 1 to R 14 are, independently, a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a linear or branched alkyl group comprising 1 to 6 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group, n is 2 or 3, and W, X, Y, and Z are, respectively, a carbon atom or a nitrogen atom, provided that only one of W, X, Y, and Z is a nitrogen atom, and the nitrogen atom does not have the substituent R 7 , R 8 , R 9 , or R 10 .