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化学学报
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化学学报 ›› 1995, Vol. 53 ›› Issue (6): 531-537. 上一篇    下一篇

研究论文

现场FT-IR光谱电化学方法研究介稳态金属卟啉的红外光谱. Ⅰ.

孙浩然;师同顺;于连香;曹锡章   

  1. 吉林大学化学系
  • 发布日期:1995-06-15

In-situ FT-IR spectroelectrochemical studies of metastable state metalloporphyrins. Ⅰ.

SUN HAORAN;SHI TONGSHUN;YU LIANXIANG;CAO XIZHANG   

  • Published:1995-06-15

PDF

359

被引次数

5

本文以现场FT-IR光透薄层光谱电化学方法详细研究了介稳态锰卟啉的红外光谱。结果表明TPPMn(Ⅲ)Cl的1490cm^-^1, 1344cm^-^1, 1204cm^-^1,1010cm^-^1, 806cm^-^1处吸收峰对中心金属氧化态敏感, 随中心金属氧化态降低上述吸收峰向低波数方向移动; 而当TPPMn(Ⅲ)Cl失去一个电子形成一价阳离子自由基时, 光谱呈现较特殊的变化, 在1287cm^-^1处呈现[TPPMn(Ⅲ)Cl]^+阳离子自由基的特征吸收。

关键词: 红外分光光度法, 光谱分析, 电化学方法, 金属卜啉

In this paper the infrared spectra of metastable state metalloporphyrin (where the metalloporphyrin is the meso-tetraphenylporphyrinatomanganese (Ⅲ) chloride [TPPMn(Ⅲ)Cl] was investigated by in-situ FT-IR spectroelectrochemistry in methylene chloride (CH~2Cl~2) and dimethylsulfoxide (DMSO). The results show that the oxidation state sensitive bands of TPPMn(Ⅲ)Cl are 1490cm^-^1, 1344cm^-^1, 1204cm^-^1, 1010cm^-^1, 806cm^-^1, and these bonds move to low frequency with the centre metal's oxidation state depression. When the TPPMn(Ⅲ)Cl gives one electron loss to form monocation radical of porphyrin, the spectrum displays a special change, the 1287cm^-^1 peak is the characteristic absorption peak of [TPPMn(Ⅲ)Cl]^+ monocation radical.

Key words: INFRARED SPECTROPHOTOMETRY, SPECTROGRAPHIC ANALYSIS, ELECTROCHEMICAL METHOD

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