In-situ FTIR studies on the electrochemical oxidation of histidine and tyrosine

被引：51

作者：

Ogura, K ^{[1
]}

Kobayashi, M ^{[1
]}

Nakayama, M ^{[1
]}

Miho, Y ^{[1
]}

机构：

[1] Yamaguchi Univ, Dept Appl Chem, Ube, Yamaguchi 7558611, Japan

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1999年 / 463卷 / 02期

关键词：

FTIR spectroscopy; oxidation; histidine; tyrosine;

D O I：

10.1016/S0022-0728(98)00458-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrochemical oxidation of cyclic amino acids such as histidine and tyrosine has been studied in a strongly basic solution by means of an in-situ FTIR spectroscopic method. The terminal COO- group of fully unprotonated anions was adsorbed on a platinum electrode from + 0.4 V versus Ag \ AgCl \ sat KCl, and the concentration of the adsorbent increased with increasing potential. However. the adsorption strength of the terminal carboxyl was weakened at + 1.0 or + 1.1 V for histidine or tyrosine, respectively. In the oxidation of tyrosine, the benzene ring started to be oriented in parallel to the electrode surface at + 0.3 V and the flat orientation reached completion at + 0.6 V. Histidine and tyrosine were both oxidized from + 1.1 V in a NaOH solution of pH 13. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：218 / 223

页数：6

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