期刊
ANALYTICAL CHEMISTRY
卷 86, 期 5, 页码 2633-2639出版社
AMER CHEMICAL SOC
DOI: 10.1021/ac403935s
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资金
- National Natural Science Foundation of China [21275023]
- Natural Science Foundation of Jiangsu Province [BK2012593]
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology [BM2012110]
- PAPD
A poly(L-glutamic acid)/beta-cyclodextrin (P-L-Glu/beta-CD)-modified glassy carbon electrode (GCE) was prepared by electrochemical polymerization of L-glutamic acid on GCE and subsequent self-assembly of beta-CD onto the obtained P-L-Glu. Electrochemical recognition of tryptophan (Trp) enantiomers with the P-L-Glu/beta-CD was investigated by differential pulse voltammetry (DPV), and the results show that Trp enantiomers can be effectively recognized at the P-L-Glu/beta-CD-modified GCE. It is also interesting to find that temperature plays a crucial role in the enantioselective recognition, which is evidenced by the variable-temperature UV spectra of the inclusion complexes of Tip enantiomers and beta-CD. Under optimum conditions, the oxidation peak current ratio of L-Trp to D-Tip could reach 2.30, which is attributed to the stereoselectivity of beta-CD to the enantiomeric pair of Trp.
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