ARYLBENZIDIENE DERIVATIVE COMPOUND, ORGANO- ELECTROLUMINESCENT ELEMENT MATERIAL AND ORGANO- ELECTROLUMINESCENT ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide an organo-electroluminescent element having a good ultimate brightness, excellently emitting light in blue violet to near ultraviolet and having a high brightness and a long life by using a novel luminescent compound. SOLUTION: This arylbenzidine derivative compound is expressed by general formula (I) (wherein R1 to R28 express each H or a substituent; at least one of R14 to R18 express a phenyl which may have a substituent; at least one of R19 to R23 express a phenyl which may have a substituent; further, the sum total of stereo parameters Es of the substituents of R1 , R2 , R3 and R4 is -7 to -2.5.