SI-29 NUCLEAR-MAGNETIC-RESONANCE STUDY OF SILICA

被引：134

作者：

LEONARDELLI, S

FACCHINI, L

FRETIGNY, C

TOUGNE, P

LEGRAND, AP

机构：

[1] Laboratoire de Physique Quantique, URA 421, E.S.P.C.I., 75231 Paris Cedex 05

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1992年 / 114卷 / 16期

关键词：

D O I：

10.1021/ja00042a018

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A Si-29 NMR study was carried out on different amorphous silica, using magic-angle spinning and proton decoupling with and without cross polarization, to obtain the surface concentration of hydroxyl groups. The samples were prepared at various stages of dehydration and with different methods of rehydration. It was found that the fraction of geminal hydroxyl silanol sites for all these samples is constant within the confidence limits of the accuracy of our data, and this indicates an equilibrium in the distribution of the hydroxyl groups at the silica surface.

引用

页码：6412 / 6418

页数：7

共 30 条

[1] NMR CONFIRMATION OF STRAINED DEFECTS IN AMORPHOUS SILICA [J].