Heating of samples induced by fast magic-angle spinning

被引：146

作者：

Brus, J ^{[1
]}

机构：

[1] Acad Sci Czech Republ, Inst Macromol Chem, CR-16206 Prague 6, Czech Republic

来源：

SOLID STATE NUCLEAR MAGNETIC RESONANCE | 2000年 / 16卷 / 03期

关键词：

heating; magic-angle spinning; nuclear magnetic resonance;

D O I：

10.1016/S0926-2040(00)00061-8

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：

Intense sample heating through high-speed magic-angle spinning (MAS; up to 58 K temperature difference) is demonstrated. The role of probehead and spinner design, as well as that of the temperature of the bearing air on the heating of a rotating sample, is examined. MAS-induced heating can affect the accurate determination of the isotropic value of the chemical shift as well as the principal values, asymmetry and anisotropy parameters of the chemical shift tensor. In some cases, a very large temperature gradient (12 K) within the fast rotating sample was found, which may limit the resolution of high-speed H-1 MAS nuclear magnetic resonance (NMR) spectra. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：151 / 160

页数：10

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