通过交叉极化实现八硅酸盐中¹H、²⁹Si和¹H、²³Na异核位移相关

1H, 29Si and 1H, 23Na heteronuclear shift correlation in octosilicate via cross-polarisation.

作者信息

Almond G G, Harris R K, Franklin K R

机构信息

Department of Chemistry, University of Durham, UK.

出版信息

Solid State Nucl Magn Reson. 1996 Feb;6(1):31-8. doi: 10.1016/0926-2040(95)01202-8.

DOI:10.1016/0926-2040(95)01202-8

PMID:8925263

Abstract

Solid-state magic-angle spinning was used to study octosilicate, a layered sodium polysilicate hydrate. Conventional one-dimensional NMR spectra detect two distinct proton and silicon sites and a single sodium species. Heteronuclear shift correlation experiments have shown that only one type of proton is involved in efficient cross-polarisation to all the silicon and sodium sites. Such selectivity could be caused by a favourable position for, and suitable rigidity of, this strongly hydrogen-bonded proton. The latter requirement can be used to propose a simple model of the interlayer space in octosilicate.

摘要

采用固态魔角旋转技术研究了八硅酸盐，一种层状水合钠多硅酸盐。传统的一维核磁共振谱检测到两个不同的质子和硅位点以及单一的钠物种。异核位移相关实验表明，只有一种类型的质子参与了与所有硅和钠位点的有效交叉极化。这种选择性可能是由于这种强氢键质子的有利位置和合适的刚性所致。后一个要求可用于提出八硅酸盐层间空间的简单模型。