NMR study of the adsorption-desorption kinetics of dissolved tetraalanine in MCM-41 mesoporous material
NMR study of the adsorption-desorption kinetics of dissolved tetraalanine in MCM-41 mesoporous material
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DOI：
10.1021/jp044389e
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发表时间：
2005-04-28
影响因子：
3.3
通讯作者：
Vega, S
中科院分区：
文献类型：
--
作者：
Pizzanelli, S;Kababya, S;Vega, S
In this study we show how deuterium magic-angle spinning NMR spectroscopy can be used to investigate the adsorption-desorption kinetics of molecules in solution at surface-liquid interfaces. An aqueous solution of deuterium-labeled tetraalanine is inserted in the pores of MCM-41 mesoporous material, and its H-2 MAS NMR spectrum is measured as a function of temperature and fraction of filling of the pores. Prior to this study, the different types of water in MCM-41 are characterized as a function of water loading of the pores. Analysis of H-2 MAS sideband line shapes enabled the determination of the adsorption and desorption rates and the activation energies of desorption.
