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Journal of Nanomaterials
Volume 2013, Article ID 170913, 8 pages
Research Article

Inclusion Phenomena between the β-Cyclodextrin Chiral Selector and Trp-D,L, and Its Use on the Assembly of Solid Membranes

College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received 3 May 2013; Accepted 7 July 2013

Academic Editor: Hamed Bahmanpour

Copyright © 2013 Hong Meng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The application of β-cyclodextrin (β-CD) and the chiral ionic liquids formed from β-cyclodextrin mono-6-deoxy-6-(3-methylimidazolium)-β-cyclodextrin tosylate (β-CD-IL) as chiral selectors is described. The inclusion phenomena between the β-cyclodextrin chiral selectors and D,L-tryptophan (D,L-Trp) was studied. The inclusion compounds were prepared by grinding, and their properties analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and nuclear magnetic resonance (NMR). The separation factor between β-CD and β-CD-IL with D,L-Trp was studied by the saturated solution method. This indicated a different binding capacity of β-CD and β-CD-IL to the two enantiomers. This result shows that the chiral ionic liquids have a higher separation factor because of their high solubility. The β-cyclodextrin chiral ionic liquids and CS were cross-linked and immobilized on an N6 membrane to form composite membranes. Adsorption experiments and permeation experiments were carried out. 105.43 mg D,L-Trp/g membrane was obtained.