Studies on the oxidation reaction of L-cysteine in a confined matrix of layered double hydroxides
Studies on the oxidation reaction of L-cysteine in a confined matrix of layered double hydroxides
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L-半胱氨酸在层状双氢氧化物受限基质中氧化反应的研究
DOI：
10.1016/j.cej.2009.06.034
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发表时间：
2009-11-01
影响因子：
15.1
通讯作者：
Wei, Min
中科院分区：
文献类型：
--
作者：
Chen, Qiuhua;Shi, Shuxian;Wei, Min
将L-半胱氨酸（L-Cys）插层到MgAl层状双氢氧化物（LDH）中。研究了在LDH片层间的有限区域内，Fe（CN）（6）（3-）对LDH的氧化反应。通过XRD、拉曼光谱和红外光谱的测试，发现Fe（CN）（6）（3-）将L-Cys氧化为胱氨酸。此外，该反应的动力学进行了研究，在分批模式。研究了Fe（CN）（6）（3-）初始浓度、L-Cys-LDH用量和反应温度对层间氧化反应的影响。该反应遵循Crank-Ginstling和Brounshtein动力学模型，表观活化能为29.93 kJ/mol。因此，这种层状材料可能作为一种新型的“分子反应器”的限制化学反应有着广阔的应用前景。(C)2009爱思唯尔有限公司版权所有。
The amino acid L-cysteine (L-Cys) was intercalated into a MgAl layered double hydroxide (LDH). and its oxidation reaction by hexacyanoferrate (III) (Fe(CN)(6)(3-)) in the confined region between sheets of LDH has been studied in detail. Based on the measurement results of XRD, Raman and FT-IR, it was found that the interlayer L-Cys was oxidized to cystine by Fe(CN)(6)(3-). Furthermore, the kinetics of this reaction was investigated in batch mode. The influences of initial Fe(CN)(6)(3-) concentration, L-Cys-LDH quantity and reaction temperature on the interlayer oxidation reaction have been studied, respectively. The reaction follows a diffusion-controlled mechanism represented by Crank-Ginstling and Brounshtein kinetic model with the apparent activation energy of 29.93 kJ/mol. Therefore, this layered material may have prospective application as a novel "molecular reactor" for confined chemical reactions. (C) 2009 Elsevier B.V. All rights reserved.