Patent ID: 8231983

Claim:
An organic electroluminescent device comprising, between a pair of electrodes, a constituent layer including at least a phosphorescence emission layer comprising a metal complex containing a metal belonging to groups 8 through 10 of the periodic table as a center metal, wherein at least one in the constituent layer contains a compound represented by formula (1), wherein A 1 and A 2 represent a substituent; n1 and n2 independently represent an integer of from 0 to 3; X 1 represents an oxygen atom, a sulfur atom, an alkylene group, an imino group, a carbonyl group, a sulfoxide group or a sulfonyl group; X 2 represents an oxygen atom, a sulfur atom, an alkylene group, an imino group, a carbonyl group, a sulfoxide group, or a sulfonyl group provided that when X 1 represents an alkylene group, X 2 represents a sulfur atom, an imino group, a carbonyl group, a sulfoxide group, or a sulfonyl group; and B 1 and B 2 represent a group represented by formula (2), wherein Z 1 and Z 2 represent an atomic group necessary to form a substituted or unsubstituted aromatic heterocyclic ring or a substituted or unsubstituted aromatic hydrocarbon ring; and Z 3 represents a divalent linkage group or a chemical bond.