Shi-Zhao Kang, Hong Chen, Xiangqing Li
Oct 1, 2010
Citations
0
Influential Citations
19
Citations
Journal
Diamond and Related Materials
Abstract
Abstract l -alanine ethyl ester modified multiwalled carbon nanotubes (MWNTs-Ala) were prepared and characterized with FT-IR spectroscopy. The electrochemical behavior of d - and l -tryptophan on the MWNTs-Ala coated electrode was investigated by using cyclic voltammetry. Meanwhile, in order to understand the mechanism of the electrochemical process, the electrochemical behavior of d - and l -tryptophan on the bare glassy carbon electrode and the electrode coated with MWNTs having carboxyl groups (MWNTs-COOH) was also discussed, respectively. The results showed that the electrode coated with MWNTs-Ala could recognize the d - and l -tryptophan chiral isomers due to the introduction of l -alanine ethyl ester on the MWNTs. Furthermore, the enantioselectivity of the MWNTs-Ala coated electrode was studied as functions of the solution pH and scan rate.