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    • 9. 发明专利
    • AZO-BASED COMPOUND AND DIAZONIUM SALT
    • JPH0586006A
    • 1993-04-06
    • JP24345691
    • 1991-09-24
    • MITA INDUSTRIAL CO LTD
    • MIZUTA YASUSHI
    • C09B35/021C07C245/06C07C245/20C09B35/033C09B35/04C09K3/00G03G5/06
    • PURPOSE:To obtain a new azo-based compound suitable as various photosensitive materials such as charge producing materials in electrophotographic photoreceptors, pigments, solar cells, etc., and a new diazonium salt as an intermediate suitable for its production. CONSTITUTION:An azo-based compound expressed by formula I (A is coupler residue), e.g. a compound expressed by formula III and a diazonium salt expressed by formula II (X is anion) which is an intermediate for the compound. The compound expressed by formula I, e.g. a compound expressed by formula Ia is obtained by dropping sodium nitrite or nitrous acid into an acidic aqueous solution of an amine-based compound expressed by formula IV at a low temperature while stirring the acidic aqueous solution, then adding an acid to be an origin of the anion (X), providing a crystallized new tetrazonium salt expressed by formula IIa, subsequently adding a prescribed amount of a coupler expressed by the formula HA to the resultant tetrazonium salt in an organic solvent and carrying out coupling reaction. Since the structure of m-terphenyl known as a quencher is introduced into the molecule of the azo-based compound expressed formula I, its sensitivity is high and surface potential can be prevented from deteriorating by repeated use. Light stability is further excellent.
    • 10. 发明专利
    • AZO-BASED COMPOUND AND DIAZONIUM SALT
    • JPH0586004A
    • 1993-04-06
    • JP24345291
    • 1991-09-24
    • MITA INDUSTRIAL CO LTD
    • MIZUTA YASUSHIKIMOTO KEIZOKATSUKAWA MASAHITOTANAKA SAKUSHIRO
    • C09B35/033C07C245/06C07C245/20C09B35/04C09K3/00G03G5/06
    • PURPOSE:To obtain a new azo-based compound suitable as various photosensitive materials such as charge producing materials in electrophotographic photoreceptors, pigments, solar cells, etc., and a new diazonium salt as an intermediate suitable for its production. CONSTITUTION:An azo-based compound expressed by formula I (A is coupler residue), e.g. a compound expressed by formula III and a diazonium salt expressed by formula II (X is anion) which is an intermediate for the compound. The compound expressed by formula I, e.g. a compound expressed by formula Ia is obtained by dropping sodium nitrite or nitrous acid into an acidic aqueous solution of an amine-based compound expressed by formula IV at a low temperature while stirring the acidic aqueous solution, then adding an acid to be an origin of the anion (X), providing a crystallized new tetrazonium salt expressed by formula IIa, subsequently adding a prescribed amount of a coupler expressed by the formula HA to the resultant tetrazonium salt in an organic solvent and carrying out coupling reaction. Since the structure of o-terphenyl which is a quencher is introduced into the molecule of the azo-based compound expressed by formula I, its sensitivity is high and surface potential can be prevented from deteriorating by repeated use. Light stability is further excellent.