Observation of hydroxyl groups by O-17 solid-state multiple quantum MAS NMR in sol-gel-produced silica

van Eck, Ernst R.H and Smith, Mark E. and Kohn, S.C. (1999) Observation of hydroxyl groups by O-17 solid-state multiple quantum MAS NMR in sol-gel-produced silica. Solid State Nuclear Magnetic Resonance, 15 (3). pp. 181-188. ISSN 0926-2040. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1016/S0926-2040(99)00055-7

Abstract

O-17 NMR parameters (C-Q, eta, delta(iso) and T-1) are reported for both Si-O-Si and Si-OH fragments within a silica gel. The Si-OH units have a wide spread of parameters but are typically characterised by a very short T-1 (similar to 0.1 ms) and C-Q < 200 kHz. These observations have extremely important implications for the quantification of such units in these gels and related glassy materials by O-17 NMR. In light of these observations, the O-17 NMR experiments have been optimised and a distinct resonance from the OH group is observed in 1D static and magic angle spinning (MAS) NMR measurements as well in the multiple quantum (MQ) experiment.

Item Type: Article
Uncontrolled keywords: 17-O solid-state NMR; Hydroxyls; Silica gel; Multiple quantum
Subjects: Q Science > QD Chemistry
Q Science > QC Physics
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: F.D. Zabet
Date Deposited: 19 Mar 2009 18:42
Last Modified: 18 Jul 2014 11:24
Resource URI: https://kar.kent.ac.uk/id/eprint/16703 (The current URI for this page, for reference purposes)
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