| abstract |
PROBLEM TO BE SOLVED: To provide an electron transport material having both high electron transport properties and hole blocking properties, and an organic electroluminescence device using the same. An electron transport material represented by the following general formula (I): (In the formula, ring A is a pyridine ring group, and R 1 and R 4 are optional substituents. R 2 and R 3 each independently represent a hydrogen atom or an optional substituent. N representing the number of rings A is an integer of 1 to 10, and Z represents a direct bond or an n-valent linking group. However, when n = 1, Z corresponds to any substituent bonded to ring A. When n ≧ 2, the plurality of R 1 to R 4 contained in one molecule may be the same or different. R 1 to R 4 and Z do not include a diarylamine skeleton. ) [Selection figure] None |