SILICON FUNCTIONALITY DISTRIBUTION ON THE SURFACE OF AMORPHOUS SILICAS BY SI-29 SOLID-STATE NMR

被引：33

作者：

LEGRAND, AP

TAIBI, H

HOMMEL, H

TOUGNE, P

LEONARDELLI, S

机构：

[1] Laboratoire the Physique Quantique - URA 1428, Ecole Supérieure de Physique et Chimie Industrielles de la Ville de Paris, 10, rue Vauquelin

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1993年 / 155卷 / 02期

关键词：

D O I：

10.1016/0022-3093(93)91316-U

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Using Si-29 solid state nuclear magnetic resonance and particularly cross-polarization, magic angle spinning and dipolar dephasing spectra, the distribution of species at the surface of different amorphous silicas was investigated. A regular evolution of single versus geminal silanols was interpreted as the result of some equilibrium of the functional groups. The deviation from this scheme which appears for pyrogenic silica was shown by dipolar dephasing to be due to strained defects among the siloxane bridges.

引用

页码：122 / 130

页数：9

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