Patent ID: 8318321

Claim:
A compound represented by the following general formula (I): wherein R 1 and R 2 each represent, independently of one another, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; wherein R 3 represents a hydrogen atom, a linear, branched, or cyclic alkyl group (at least one methylene group of the alkyl group may be replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —CH═CH—, —C≡C—, or a substituted or unsubstituted arylene group with one or two rings, and a hydrogen atom of the alkyl group may be replaced by a fluorine atom), a substituted or unsubstituted aryl group with one or two rings (at least one CH of the aryl group may be replaced by a nitrogen atom), where the aryl group may be substituted with an alkyl group, an aryl group, or a heterocyclic group; wherein Ar represents a substituted or unsubstituted fused polycyclic aromatic group with four or more rings; wherein n represents an integer of 2 to 10; and wherein the plurality of fluorene-2,7-diyl groups may each independently have a substituent and may be the same or different from each other.