影像科学与光化学 ›› 1995, Vol. 13 ›› Issue (1): 22-27.DOI: 10.7517/j.issn.1674-0475.1995.01.22

• 研究论文 • 上一篇    下一篇

1-苯基-5-巯基四氮唑对胶态金催化Co(Ⅲ)络合物氧化对苯二胺彩显剂的反应的影响

莫亦波, 赵文芳, 胡萍, 任新民   

  1. 中国科学院感光化学研究所, 北京100101
  • 收稿日期:1994-01-20 修回日期:1994-06-21 出版日期:1995-02-20 发布日期:1995-02-20
  • 通讯作者: 赵文芳
  • 基金资助:
    中国科学院自然科学基金

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

MO YI-BO, ZHAO WEN-FANG, HU PING, REN XIN-MIN   

  1. Institute of Photographic Chemistry, Academia Sinica, Beijing 100101, P.R. China
  • Received:1994-01-20 Revised:1994-06-21 Online:1995-02-20 Published:1995-02-20

摘要: 本文在碱性介质中,研究了PMT(1-苯基-5-巯基四氮唑)存在时胶态金催化Co(NH3)_6Cl3氧化对苯二胺彩显剂(PPD)的动力学,反应跟踪是通过可见紫外分光光度计监测PPD的完全氧化产物,QDI的显色反应来进行的。结果表明,在pH为10.20,且胶态金的初始浓度一定时,PMT对反应初始速率有较大的影响:PMT的初始浓度[PMT].较小时,对反应有抑制作用:而[PMT].较大时,对反应有促进作用。通过在无PMT、低[PMT].高[PMT].时对上述反应动力学的测定,我们推测PMT对反应的抑制-促进作用是由于PMT在胶态金上吸附状态的变化造成的。实验表明,当胶态金的初始浓度一定时,PMT对[Co(NH3)5Cl]Cl2氧化PPD的反应也有类似作用。

关键词: 胶体催化, 钴(Ⅲ)络合物, 彩显剂, 动力学, 抑制剂

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