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化学学报
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化学学报 ›› 1995, Vol. 53 ›› Issue (11): 1118-1123. 上一篇    下一篇

研究论文

脂溶性酞菁钴(III)为载体的高选择性亚硝酸根PVC膜电极

李梭忠;胡敏;俞汝勤   

  1. 湖南大学化学化工系
  • 发布日期:1995-11-15

A highly selective nitrite sensitive PVC membrane electrode using lipophilic phthalocyanine cobalt (III) complex as the carrier

LI SUOZHONG;HU MIN;YU RUQIN   

  • Published:1995-11-15

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被引次数

11 | 2

以自制的4,4',4'',4'''-四特丁基酞菁钴(II)为原料合成二氯4,4',4'',4'''-四特丁基酞菁钴(III)。以此为载体制备PVC膜电极。该电极的电位选择性次序明显不同于Hofmeister次序, 其最佳 响应斜率为-52mV/pNO2^-, 线性范围为3×10^-^5～1×10^-^1mol.dm^-^3NaNO2。通过改变配合物轴向的配位阴离子, 用紫外-可见光谱法对电极的响应机理作了初步探讨。

关键词: 紫外分光光度法, 反应机理, 离子选择电极, 膜电极, 亚硝酸, 酞菁钴

In this paper, dichloride 4,4',4'',4'''-tetra-tert-butylphthalocyanine cobalt (III) was synthesized and incorporated into a PVC membrane. The electrode prepared exhibits a selectivity sequence which is different from the classical Hofmeister pattern. The electrode has a high selectivity for nitrite and exhibits a linear response from 3×10^-^5 to 1×10^-^1mol.dm^-^3 of nitrite with a slope of -52mV/decade. The response mechanism of the electrode was studied using solvent extraction and UV-Vis spectroscopy by changing the axial coordination anions of the complex.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, REACTION MECHANISM, ION SELECTIVE ELECTRODE, MEMBRANE ELECTRODES, NITROUS ACID, COBALT PHTHALOCYANINE

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