| abstract |
The present invention is a compound represented by formula (1-1). (W1, W2 and W3 are −CH or a nitrogen atom. At least one of W1, W2 and W3 is a nitrogen atom. Xa1, Ya1, and Za1 are each an optionally substituted 1,3-phenylene group or an optionally substituted 1,4-phenylene group. At least one Za1 is a 1,3-phenylene group. Xa2 and Ya2 are each an optionally substituted phenyl group. Za2 is an optionally substituted N-carbazolyl group. f11 is 1 or 2. g11 is an integer between 1 and 5. h11 is an integer between 2 and 5. j11 is an integer between 1 and 6. f11 + g11 + h11 + j11 is at least 5. R11 is a hydrogen atom or a substituent.) |