Electrochemical chiral recognition of tryptophan using a glassy carbon electrode modified with β-cyclodextrin and graphene

被引：66
|
作者：
Feng, Wanlian [1 ]
Liu, Chao [1 ]
Lu, Shaoyou [2 ]
Zhang, Chuyi [1 ]
Zhu, Xiaohua [1 ]
Liang, Yong [1 ]
Nan, Junmin [1 ]
机构：
[1] S China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China
[2] Shenzhen Ctr Dis Control & Prevent, Shenzhen 518055, Peoples R China
来源：
MICROCHIMICA ACTA | 2014年 / 181卷 / 5-6期
基金：
中国国家自然科学基金;
关键词：
Graphene; Cyclodextrin; Chiral recognition; Ligand exchange; Tryptophan enantiomers; EXCHANGE-CAPILLARY-ELECTROPHORESIS; DANSYL AMINO-ACIDS; LIGAND-EXCHANGE; ENANTIOSELECTIVE SEPARATION; OXIDE; ENANTIOSEPARATION; SENSOR; CE;
D O I：
10.1007/s00604-014-1174-0
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We report on a method for electrochemical enantioselective recognition of tryptophan (Trp) enantiomers. It is based on competitive host-guest interaction between a deoxy-(2-aminoethylamino)-beta-cyclodextrin (CD) bound to graphene nanosheets and the Cu(II) complexes of the Trp enantiomers via a ligand exchange mechanism. Chiral recognition was investigated via cyclic voltammetry and electrochemical impedance spectroscopy. The results reveal that the CD bound to graphene displays a stronger interaction with the Cu(II) complex of L-Trp than to that of D-Trp. The method was applied to the determination of the ratio of Trp enantiomers in mixtures.
引用
收藏
页码：501 / 509
页数：9
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