高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (9): 1280.

• 论文 • 上一篇    下一篇

金属卟啉化合物光催化反应研究(Ⅲ)─金属卟啉光助氧化甲醇动力学研究

杨国昱, 王清民, 孙晋峰, 赵千, 于连香, 曹锡章   

  1. 吉林大学化学系, 长春, 130023
  • 收稿日期:1993-10-13 修回日期:1994-06-10 出版日期:1994-09-24 发布日期:1994-09-24
  • 通讯作者: 杨国显,男,29岁,硕士,讲师.
  • 作者简介:杨国显,男,29岁,硕士,讲师.
  • 基金资助:

    国家自然科学基金

Studies on the Photochemical Reactions Catalyzed by Metalloporphyrin Complexes(Ⅲ)─Kinetics of Photoassisted Oxidation Reaction of Methanol by Metalloporphyrins

YANG Guo-Yu, WANG Qing-Min, SUN Jin-Feng, ZHAO Qian YU Lian-Xhng, CAO Xi-Zhang   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1993-10-13 Revised:1994-06-10 Online:1994-09-24 Published:1994-09-24

摘要: 研究了6种金属卟啉在有甲醇存在的脱气水或二甲基甲酰胺溶液中的光化学行为,当用高压汞灯照射时,金属卟啉被还原,同时甲醇被氧化成甲醛,以碘化四(对三甲胺基)苯基钴(Ⅲ)卟啉为例详细地研究了影响光助氧化甲醇反应的因素,并对反应机理进行了探讨。

关键词: 金属卟啉, 光助反应, 动力学

Abstract: In deaerated solution of water-methanol or water-methanol-pyridine system, trivalent ions(Co(Ⅲ)and Mn(Ⅲ))porphyrins were reduced to divalent ions on illummination of light with simultaneous oxidation of methanol. The kinetic study on the photoreduction revealed that the reduction rate of Co(Ⅲ)followed the pseudo-first-order rate expression at 20℃ and pH 2 to 13 in the presence of excess methanol. The observed rate constants were dependent on [CH3OH] and pHvalues.The possible mechnisms for the photoreduction of metalloporphyrins were discussed.

Key words: Metalloporphyrins, Photoassisted reaction, Kinetics

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