To provide an azo-boron complex compound which exhibits particularly excellent light absorption properties in the visible light region and good light-emitting properties in the near infrared region, can be easily dispersed in a polymer resin, excels in light resistance, heat resistance and the like, and can be simply produced; a process for producing the azo-boron complex compound, and a hydrazone compound which can be used as a precursor for producing the azo-boron complex compound.
The azo-boron complex compound is represented by formula (I) (wherein X is an aryl group or the like; R1 is a halogen or the like; R2 to R5 each forms a cyclic structure with adjacent carbon or is hydrogen; and R6 nd R7 are each a 1-12C alkyl group or the like).
SAKAMOTO TAKEHIRO
OYAMA HARUKA
Tadashi Sugakawa
Hiroaki Ito
Hisahiko Ueki
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