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Issue 40, 2016
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17O MAS NMR studies of oxo-based olefin metathesis catalysts: a critical assessment of signal enhancement methods

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Abstract

The DFS enhancement method as applied to 17O 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 17O MAS NMR signal is shown through its successful application to silica-supported olefin metathesis catalysts.

Graphical abstract: 17O MAS NMR studies of oxo-based olefin metathesis catalysts: a critical assessment of signal enhancement methods

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Publication details

The article was received on 04 Jul 2016, accepted on 08 Sep 2016 and first published on 09 Sep 2016


Article type: Paper
DOI: 10.1039/C6CP04667C
Citation: Phys. Chem. Chem. Phys., 2016,18, 28157-28163
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    17O MAS NMR studies of oxo-based olefin metathesis catalysts: a critical assessment of signal enhancement methods

    D. Grekov, Y. Bouhoute, I. Del Rosal, L. Maron, M. Taoufik, R. M. Gauvin and L. Delevoye, Phys. Chem. Chem. Phys., 2016, 18, 28157
    DOI: 10.1039/C6CP04667C

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