BLUE COLOR LIGHT-EMITTING COMPOUND, ORGANIC ELECTROLUMINESCENT ELEMENT USING THE SAME AND DISPLAY ELEMENT ADOPTING THE SAME AS LUMINESCENT MATERIAL

PROBLEM TO BE SOLVED: To obtain a new blue color light-emitting compound which has excellent luminous efficiency and brightness characteristics and is useful for organic electroluminescent element and so on. SOLUTION: A compound of formula I [a1, a2 are each a 1 to 20C alkyl, SiR3 (R is a 1 to 10C alkyl) or H; b1, b2 are each a 1 to 20C alkyl, a 6 to 20C aryl or SiR3]. For example, a compound of formula II. The compound of formula I is obtained, for example, by dissolving 9,9-dihyxylflurorene in dichloromethane, adding aluminum chloride to the solution, reacting the mixture with gradually dropwisely added 4-bromobenzoyl chloride, subjecting the obtained compound of formula III to the addition-reaction of (4-bromobenzyl) triphenylphosphonium bromide, subjecting the reaction product to a Wittig reaction, and then mixing and reacting the obtained compound of formula IV with 2 equivalents of 4-t-butylbenzene boric acid, tetrakis (triphenylphosphine) palladium, and potassium carbonate.