| abstract |
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); Ar 1 is a naphthalene-1,4-diyl or naphthalene-1,5-diyl group; Ar 2 is a phenyl or 2-naphthyl group. Optional hydrogens of the Py, Ar 1 and Ar 2 can be substituted with C 1-6 alkyl groups and/or C 3-6 cycloalkyl groups. |