THE INFLUENCE OF 1-PHENYL-5-MERCAPTOTETRAZOLE ON THE OXIDATION OF p-PHENYLENEDIAMINE WITH Co(Ⅲ)-COMPLEXES CATALYZED BY AU SOL

doi:10.7517/j.issn.1674-0475.1995.01.22

Abstract

Abstract: In this paper,the catalysis of Au sol in the reaction of [Co(NH₃)₅]Cl₃ with P-phenylenediamine(PPD)was studied in the presence of 1-phenyl-5-mercaptoterrazole(PMT).When pH =10.20 at 25℃,it was found that PMT influences the initial reaction rate strongly:PMT restrains the reaction when [PMT].is low,and accelerates the reaction when [PMT]is high. By means of determining the kinetic parameters,the possile mechanism was discussed.It was proposed that the restraining-accelerating effect may be caused by the change of absorption state of PMT on Au sol.It was found that the similar phenomenal so exists when [Co(NH₃)₆]Cl₃ is replaced by [Co(NH₃)₅Cl]Cl₂.

Key words: colloidal catalysis, Co(Ⅲ)-complexes, kinetics, color developer, restrainer

MO YI-BO, ZHAO WEN-FANG, HU PING, REN XIN-MIN. THE INFLUENCE OF 1-PHENYL-5-MERCAPTOTETRAZOLE ON THE OXIDATION OF p-PHENYLENEDIAMINE WITH Co(Ⅲ)-COMPLEXES CATALYZED BY AU SOL[J]. Imaging Science and Photochemistry, 1995, 13(1): 22-27.

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THE INFLUENCE OF 1-PHENYL-5-MERCAPTOTETRAZOLE ON THE OXIDATION OF p-PHENYLENEDIAMINE WITH Co(Ⅲ)-COMPLEXES CATALYZED BY AU SOL

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