| 摘要 |
The compound represented by formula (1) is useful as an electron transport material for organic EL elements. Use of said electron transport material contributes to extension of the life of organic EL elements. In formula (1), Py is a group selected from a set of monovalent groups represented by Formulas (2), (3), (4) and (5); Ar1 is a naphthalene-1,4-diyl or naphthalene-1,5-diyl group; Ar2 is a phenyl or 2-naphthyl group. Optional hydrogens of the Py, Ar1 and Ar2 can be substituted with C1-6 alkyl groups and/or C3-6 cycloalkyl groups.
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