Issue 21, 2006

Study on the intercalation and interlayer oxidation transformation of l-cysteine in a confined region of layered double hydroxides

Abstract

Two kinds of amino acids (L-cysteine and L-cystine, represented as L-CySH and L-Cys respectively) have been intercalated into MgAl layered double hydroxides by coprecipitation. The structure and composition of the intercalated materials have been characterized by X-ray diffraction (XRD) and elemental analysis. Furthermore, the oxidation of L-CySH intercalated LDHs by, respectively, hydrogen peroxide and bromine has been studied. Based on the FT-Raman, FT-IR, and 13C MAS NMR spectra data, it has been found that H2O2 oxidized the interlayer L-CySH to cystine, while the oxidation product of intercalated L-CySH by Br2 was cysteic acid regardless of the bromine/cysteine ratio, which is different from the bulk reaction. Therefore, this layered material may have prospective application as the basis of a novel “molecular reactor” for confined chemical reactions.

Graphical abstract: Study on the intercalation and interlayer oxidation transformation of l-cysteine in a confined region of layered double hydroxides

Article information

Article type
Paper
Submitted
19 Dec 2005
Accepted
17 Mar 2006
First published
07 Apr 2006

J. Mater. Chem., 2006,16, 2102-2109

Study on the intercalation and interlayer oxidation transformation of L-cysteine in a confined region of layered double hydroxides

M. Wei, Z. Shi, D. G. Evans and X. Duan, J. Mater. Chem., 2006, 16, 2102 DOI: 10.1039/B517980G

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