新型尾式卟啉-吡啶季铵盐对铜(Ⅱ)显色反应研究

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摘要：研究了三种新型不同链长尾式卟啉-吡啶季铵盐与Cu²⁺的显色反应条件，其络合物最大吸收波长分别为413 nm(Ⅰ)，(Ⅱ); 414 nm(Ⅲ)。在相同条件下，试剂最大吸收波长分别为443.5 nm(Ⅰ); 444 nm(Ⅱ); 446 nm(Ⅲ)。对比度大约30 nm。试剂与铜络合比均为1∶1 ，表观摩尔吸光系数为(Ⅰ)3.4×10⁵，(Ⅱ)2.9×10⁵; (Ⅲ)2 .5×10⁵ L·mol^-1·cm^-1, 铜含量分别在(Ⅰ)0～0.5 μg·(10 mL)^-1;(Ⅱ)0～0 .6 μg·(10 mL)^-1;(Ⅲ)0～1.0 μg·(10 mL)^-1内符合比尔定律, 可用于痕量铜的测定。

关键词：卟啉-吡啶季铵盐;铜;分光光度

Abstract：Color reactions of Cu²⁺ with three new different-chain-length tailed porphyrin-pyridine quaternary ammonium salts were studied. The Soret bands of complexes lie at (Ⅰ)，(Ⅱ)413 nm and (Ⅲ)414 nm, which are separated from those of the diacid forms (Ⅰ)443.5 nm，(Ⅱ)444 nm and (Ⅲ)446 nm. The contrast is about 30 nm. The ratio of Cu²⁺: reagent in the complexes is 1∶1． The apparent molar absorptivities of complexes are(Ⅰ)3.4×10⁵，(Ⅱ)2.9×10⁵ and(Ⅲ)2.5×10⁵ L·mol^-1·cm^-1, and Beer’s law is obeyed in the ranges of (Ⅰ)0-0.5 μg·(10 mL)^-1，(Ⅱ)0-0.6 μg·(10 mL)^-1 and (Ⅲ)0-1 .0 μg·(10 mL)^-1 for Cu²⁺. This method can be used for the determination of trace Cu²⁺.

Key words： Porphyrin-pyridine quaternary ammonium salts;Copper;Spectrophotometry

收稿日期: 2002-06-10 修订日期: 2002-11-08

中图分类号:

O657.32

通讯作者: 刘彦钦

引用本文:

韩士田，刘彦钦^*，邓辉 . 新型尾式卟啉-吡啶季铵盐对铜(Ⅱ)显色反应研究 [J]. 光谱学与光谱分析, 2004, 24(03): 330-332.
HAN Shi-tian，LIU Yan-qin^*，DENG Hui . Color Reaction of New Tailed Porphyrin-pyridine Quaternary Ammonium Salts with Copper (Ⅱ) . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(03): 330-332.

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