Efficiency of the refocused 31P-29Si MAS-J-INEPT NMR experiment for the characterization of silicophosphate crystalline phases and amorphous gels

被引：47

作者：

Coelho, C. ^{[1
]}

Azais, T. ^{[1
]}

Bonhomme-Coury, L. ^{[1
]}

Laurent, G. ^{[1
]}

Bonhomme, C. ^{[1
]}

机构：

[1] Univ Paris 06, Lab Chimie Mat Condensee Paris, UMR 7574, F-75005 Paris, France

来源：

INORGANIC CHEMISTRY | 2007年 / 46卷 / 04期

关键词：

D O I：

10.1021/ic061964f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

One- and two-dimensional refocused MAS-J-INEPT NMR experiments in the solid state (through-bond polarization transfer) involving the highly abundant P-31 spin and the rare Si-29 spin are described for the crystalline silicophosphate phase Si5O(PO4)(6) and complex mixtures of SiP2O7 polymorphs. The evaluation of the (2)J(P-O-Si) coupling constants for all Si-29 sites is obtained by the careful analysis of the INEPT build-up curves under fast MAS. The results are in agreement with the crystallographic data, taking into account the various J coupling paths. The efficiency of the experiment is demonstrated by its application to more complex systems such as silicophosphate amorphous gels (obtained by the sol-gel process).

引用

页码：1379 / 1387

页数：9

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