| 摘要 |
PROBLEM TO BE SOLVED: To provide a material emitting deep blue light and having good stability and high luminescence efficiency.SOLUTION: There is provided a compound expressed by the formula (wherein Rand Rare each independently F, Cl or the like; Rand Rare each independently H, F, Cl or the like; Ar groups are each independently substituted 1,4-interarylene; n is 0, 1, 2 or 3; Ris optionally substituted diarylamino, optionally substituted diarylaminophenoxy or R-O-Ph-O; Ph is optionally substituted p-interphenylene; and Ris 1C-10C alkyl, or 1C-9C and 1-4[O] ether). |
