期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 18, 期 40, 页码 28157-28163出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp04667c
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资金
- Agence Nationale de la Recherche (OXOCAT) [ANR-12-BS07-0021-01]
- CNRS
- Chevreul Institute [FR 2638]
- Ministere de l'Enseignement Superieur et de la Recherche
- Region Nord Pas de Calais
- FEDER
- TGIR RMN THC Fr3050
- Agence Nationale de la Recherche (ANR) [ANR-12-BS07-0021] Funding Source: Agence Nationale de la Recherche (ANR)
The DFS enhancement method as applied to O-17 MAS NMR was critically assessed, first on NaPO3, a simple binary glass system, and in a second step, on a series of catalysis-related organometallic molecules and materials. The robustness of DFS was investigated for the wide range of anisotropic parameters (quadrupolar coupling and chemical shift anisotropy) encountered in these samples. Emphasis has been put on the variation of signal enhancements with respect to the DFS final sweep frequency, pulse amplitude and pulse duration, while line shape distortion issues were also addressed. Finally, the robustness of DFS enhancement of the O-17 MAS NMR signal is shown through its successful application to silica-supported olefin metathesis catalysts.
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