NMR study of the adsorption-desorption kinetics of dissolved tetraalanine in MCM-41 mesoporous material

被引：36

作者：

Pizzanelli, S

Kababya, S

Frydman, V

Landau, M

Vega, S ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Chem Phys, IL-76100 Rehovot, Israel

[2] Weizmann Inst Sci, Chem Res Support Unit, IL-76100 Rehovot, Israel

[3] Ben Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, Israel

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 16期

关键词：

D O I：

10.1021/jp044389e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：8029 / 8039

页数：11

共 54 条

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