| abstract |
A novel terpyridine derivative is provided as an electron transport material for an organic EL device that emits green phosphorescence. A terpyridine derivative represented by the following general formula (1) and having a triplet energy higher than 2.5 eV. (X 1 is —O—, —S—, —NR 1 —, or —CR 2 R 3 —; R 1 to R 3 are each independently H, an aliphatic substituent, or a substituent represented by Formula (2). Base ) [Selection figure] None |