| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a 1, 2, 4, 5-substituted phenyl derivative achieving reduction in power consumption of an organic electroluminescent element and to provide an organic electroluminescent element having a long life by using the 1, 2, 4, 5-substituted phenyl derivative as an electron transport material. <P>SOLUTION: The 1, 2, 4, 5-substituted phenyl derivative is represented by formula (1). In the formula, Ar<SP POS="POST">1</SP>is a nitrogen-containing heteroaromatic group, a phenyl group, or a 2- to 4-ring hydrocarbon group which may be substituted with a phenyl group or an alkyl group. X is a single bond, phenylene group, naphthylene group or bivalent nitrogen-containing heteroaromatic group. At least one of Ar<SP POS="POST">2</SP>, Ar<SP POS="POST">3</SP>and Ar<SP POS="POST">4</SP>is a nitrogen-containing heteroaromatic group which may be substituted with an alkyl group and the remaining is hydrogen atom. When X is 1, 3-phenylene group, Ar<SP POS="POST">1</SP>is not the same as Ar<SP POS="POST">2</SP>and Ar<SP POS="POST">4</SP>and, when X is 1, 4-phenylene group, Ar<SP POS="POST">1</SP>is not the same as Ar<SP POS="POST">3</SP>. <P>COPYRIGHT: (C)2012,JPO&INPIT |
