Journal of Inclusion Phenomena and Macrocyclic Chemistry

, Volume 68, Issue 3, pp 467–473

Study on the inclusion interaction of ethyl violet with cyclodextrins by MWNTs/Nafion modified glassy carbon electrode

Original Article

DOI: 10.1007/s10847-010-9811-7

Cite this article as:
Song, JP., Guo, YJ., Shuang, SM. et al. J Incl Phenom Macrocycl Chem (2010) 68: 467. doi:10.1007/s10847-010-9811-7

Abstract

The interactions of ethyl violet (EV) with cyclodextrins (CDs) were investigated by Multi-wall carbon nanotubes/Nafion composite film modified glassy carbon electrode (MWNTs/Nafion/GCE). It was found that the MWNTs/Nafion composite film can effectively catalyze the electrode reaction of EV. The variation of the electrochemical behavior of EV upon the addition of CDs indicated the formation of the inclusion complexes of EV with β-CD, heptakis (2,3,6-tri-O-methyl)-β-CD (TM-β-CD), heptakis (2,6-di-O-methyl)-β-CD (DM-β-CD), hydroxypropyl-β-CD (HP-β-CD), and carboxymethyl-β-CD (CM-β-CD). The stoichiometry ratios of EV and the above five CDs were found to be 1:1. The inclusion ability obeyed the order: CM-β-CD > HP-β-CD > TM-β-CD > DM-β-CD > β-CD. The results showed that the modified β-CDs exhibited stronger binding ability than native β-CD, especially the charged CM-β-CD, which implied that the inclusion capacity depends on not only size matching and hydrophobicity but also electrostatic interaction. 1HNMR spectra and molecule mechanics calculations suggested that EV was included into the cavity of β-CD from the wider side.

Keywords

Ethyl violetCarbon nanotubesNafionCyclodextrinDifferential pulse voltammetry

Supplementary material

10847_2010_9811_MOESM1_ESM.doc (123 kb)
Supplementary material 1 (DOC 123 kb)

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Research Center for Environmental Science and Engineering, Department of ChemistryShanxi UniversityTaiyuanChina
  2. 2.College of Chemistry and Chemical EngineeringShanxi Datong UniversityDatongChina