L-组氨酸及其钴镍配合物的电化学及UV/VIS研究

IF 0.7 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Croatica Chemica Acta Pub Date : 2018-12-30 DOI:10.5562/CCA3423

Martina Medvidović‐Kosanović, A. Stanković, Marija Jozanović, M. Drulak, Marina Ilić

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引用次数: 8

摘要

在这项工作中，通过循环和微分脉冲伏安法研究了L-组氨酸在pH 4–10范围内的氧化还原性质。结果表明，L-组氨酸在pH4-pH9范围内不具有电活性，而用微分脉冲伏安法检测了L-组氨酸咪唑环在pH10时的氧化峰。研究发现，L-组氨酸在溶液中的氧化峰值电流随着其浓度的增加而增加。还检测了L-组氨酸氧化产物在玻碳电极表面的吸附。采用伏安法（循环和微分脉冲伏安法）和紫外/可见光谱法研究了L-组氨酸与过渡金属配合物的形成。已经发现L-组氨酸与金属离子（Co2+和Ni2+）以1∶1的比例形成八面体络合物。

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Electrochemical and UV/VIS Study of L-Histidine and Its Complexes with Cobalt and Nickel

In this work oxido-reduction properties of L-histidine were studied by cyclic and differential pulse voltammetry in a pH range from pH 4–10. The results have shown that L-histidine is not electroactive in a pH range from pH 4 to pH 9, while oxidation peak of L-histidine’s imidazole ring at pH 10 was detected with differential pulse voltammetry. It has been found that the oxidation peak current of L-histidine increased with the increase of its concentration in a solution. Adsorption of oxidation product of L-histidine on a glassy carbon electrode surface was also detected. Voltammetric techniques (cyclic and differential pulse voltammetry) and UV/VIS spectroscopy were used to study formation of L-histidine complexes with transition metals. It has been found that L-histidine formed octahedral complex with metal ion (Co2+ and Ni2+) in a 1 : 1 ratio.

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来源期刊

Croatica Chemica Acta 化学-化学综合

CiteScore

0.60

自引率

0.00%

发文量

审稿时长

18 months

期刊介绍： Croatica Chemica Acta (Croat. Chem. Acta, CCA), is an international journal of the Croatian Chemical Society publishing scientific articles of general interest to chemistry.