影像科学与光化学 ›› 1991, Vol. 9 ›› Issue (1): 76-80.DOI: 10.7517/j.issn.1674-0475.1991.01.76

• 研究简报 • 上一篇    

铁离子催化十二钨酸络钴酸钾氧化羟胺反应的动力学和机理 Ⅱ.在HCIO4-NaClO4介质中的反应

陈浴淙, 周本茂, 任新民   

  1. 中国科学院感光化学研究所, 100101
  • 收稿日期:1989-08-10 修回日期:1990-05-03 出版日期:1991-02-20 发布日期:1991-02-20
  • 通讯作者: 任新民

KINETICS AND MECHANISM OF IRON (Ⅲ) CATALYZED OXIDATION OF HYDROXYLAMINE BY 12-TUNGSTO-COBALT(Ⅲ)ATE

CHEN YU-CONG, ZHOU BEN-MAO, REN XIN-MIN   

  1. Institute of Photographic Chemistry, Academia Sinica, Beijing 100101, P.R. China
  • Received:1989-08-10 Revised:1990-05-03 Online:1991-02-20 Published:1991-02-20

摘要: 羟胺是典型的显影剂和防氧化剂,研究它的氧化反应机理是很有意义的。前文在HAc-NaAc(pH-3.9-5.0)介质中的研究发现,当Σ[Fe3+]<3×10-6mol·L-1时,铁离子催化十二钨酸络钴酸钾K5[CoW12O40](简记为Co3+W)。

关键词: 氧化动力学, 钴(Ⅲ)络合物, 均相催化, 电子转移

Abstract: Different from in HAc-NaAc (pH = 3.9-5.0), in HClO4-NaClO4 ([H+] - 0.1-0.4 mol/L) the reaction of the Fe (Ⅲ) catalyzed oxidation of hydroxylamine by 12-tungstocobalt (Ⅲ) ate obeys the following kinetic law:

This paper gives a description of the mechanism of the synergetic electron-proton transfer between NH2OH and Fe3+(OH)1- through a pentagonal model, considering that the active form of Fe (Ⅲ) is Fe3+(OH)1-.

Key words: oxidation kinetics, Co(Ⅲ)-complex, electron transfer, homogeneous catalysis