Patent ID: 8916275

Claim:
A light emitting device material comprising a pyrene compound represented by formula (1): R 1 to R 7 may be the same or different, and are each selected from the group consisting of hydrogen, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an alkoxy group, an alkylthio group, an arylether group, an arylthioether group, an aryl group, a heteroaryl group, a halogen, a carbonyl group, a carboxyl group, an oxycarbonyl group, a carbamoyl group, an amino group, and a silyl group; L 1 and L 2 may be the same or different, and L 1 is an arylene group and L 2 is a single bond or an arylene group; X is selected from the group consisting of an alkyl group, an aryl group and a heteroaryl group; and Ar 1 is a pyridyl group, a quinolinyl group, an isoquinolinly group , a quinoxanyl group, a pyrazinyl group, a pyrimidyl group, a pyridazinyl group, a phenanthrolinyl group, an imidazopyridyl group, a triazyl group, an acridyl group, a benzoimidazolyl group, a benzooxazolyl group and a benzothiazolyl group, and Ar 2 is an aryl group or a heteroaryl group, provided that when Ar 2 is a heteroaryl group, a dibenzofuranyl group, a dibenzothiophenyl group and a carbazolyl group are excluded.