Importance

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Abstract

The present invention provides a new bipyridine derivative which is suitable for an electron transport material of an organic electronics element and which has bipyridyl central rings as a core, and further provides an organic electroluminescence element containing the derivative.The bipyridine derivative is expressed by the following general formula.(where A₁, A₂: represent an aromatic heterocyclic group (except for a carbazolyl group) and an aromatic hydrocarbon group and the aromatic heterocyclic group may be combined; a, b=1 or 2; Ar₁, Ar₂: represent a divalent or trivalent aromatic hydrocarbon group which may be substituted by hydrogen atom, an alkyl group, a cycloalkyl group, or an alkoxy group; B₁, B₂: represent hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, an aromatic hydrocarbon group, or an aromatic heterocyclic group; and ring E₁, ring E₂: represent a pyridine ring, and may have hydrogen atom, an alkyl group, a cycloalkyl group, or an alkoxy group.), which is used as an electron transport material.

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First Claim