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US08119828B2 Material for an organic electroluminescence device and an organic electroluminescence device 有权
有机电致发光器件和有机电致发光器件的材料

Material for an organic electroluminescence device and an organic electroluminescence device
Abstract:
A material for an organic electroluminescence device represented by the following formula (I): wherein X1 is one of divalent groups represented by the following (a) to (e); Y1 to Y4 are independently a carbon atom or a nitrogen atom; and R1 to R4 are independently a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocycle, a halogen atom, a fluoroalkyl group or a cyano group, or R1 and R2, and R3 and R4 are independently bonded to form a substituted or unsubstituted aromatic ring or a substituted or unsubstituted heterocycle.
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