DYNAMIC H-2 NUCLEAR-MAGNETIC-RESONANCE OF ROTATING SOLIDS

被引：36

作者：

WEINTRAUB, O ^{[1
]}

VEGA, S ^{[1
]}

机构：

[1] WEIZMANN INST SCI,DEPT CHEM PHYS,IL-76100 REHOVOT,ISRAEL

来源：

SOLID STATE NUCLEAR MAGNETIC RESONANCE | 1995年 / 4卷 / 06期

关键词：

H-2 NUCLEAR MAGNETIC RESONANCE; MAGIC-ANGLE SPINNING; DIMETHYL SULFONE; DYNAMIC NUCLEAR MAGNETIC RESONANCE; FLOQUET THEORY;

D O I：

10.1016/0926-2040(95)00007-D

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：

The sensitivity of one-dimensional dynamic magic-angle spinning (MAS) and off-MAS H-2 nuclear magnetic resonance spectra to changes in the parameters of jump-type molecular motions is studied. The Floquet theory approach is used to simulate spectra of spins with I = 1, which are involved in exchange processes in rotating solids. The solution of the Bloch-McConnell equations for rotating samples are derived and some simulated frequency spectra are shown. The dependence of the lineshapes of the center and sidebands of the MAS and off-MAS spectra on the exchange parameters are discussed. Experimental results of H-2 spectra of perdeuterated dimethyl sulfone, obtained in the temperature range 20-55 degrees C, are demonstrated. The methyl groups in this molecule undergo pi flips at rates that can be detected by MAS and off-MAS NMR. The shapes of the experimental sidebands are compared with simulated results.

引用

页码：341 / 351

页数：11

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