Patent ID: 8512878

Claim:
A diaminopyrene derivative for use as an emitting material for an organic EL device, represented by a formula (1) below, where: R represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a fluorine atom; a represents an integer of 1 to 9; when a is 2 or more, the plurality of R are allowed to be mutually the same or different; A and A′ each independently represent a hydrogen atom, substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, substituted or unsubstituted aryl group having 5 to 25 carbon atoms, substituted or unsubstituted aralkyl group having 6 to 25 carbon atoms, substituted or unsubstituted cycloalkyl group having 3 to 25 carbon atoms, substituted or unsubstituted alkoxyl group having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy group having 5 to 25 carbon atoms, substituted or unsubstituted arylamino group having 5 to 25 carbon atoms, substituted or unsubstituted alkylamino group having 1 to 20 carbon atoms, fluorine atom or cyano group; b and c each represent an integer of 1 to 5 while b+c≦9 is satisfied; when b is 2 or more, the plurality of A are allowed to be mutually the same or different and to be bonded together to form a saturated or unsaturated ring; when c is 2 or more, the plurality of A′ are allowed to be mutually the same or different and to be bonded together to form a saturated or unsaturated ring; X and X′ each independently represent a substituent containing at least one of Ge, P, B and Si; d and e each represent an integer of 0 to 5 while d+e≧1 is satisfied; when d is 2 or more, the plurality of X are allowed to be mutually the same or different and to be bonded together to form a saturated or unsaturated ring; and when e is 2 or more, the plurality of X′ are allowed to be mutually the same or different and to be bonded together to form a saturated or unsaturated ring.