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Efficiency of dipolar and J-derived solid-state NMR techniques for a new pair of nuclei {31P,29Si}. Towards the characterization of Si-O-P mesoporous materials

Abstract : Solid-state NMR methods based on dipolar and J-derived experiments such as CP, MAS-J-HMQC and MAS-J-INEPT MAS have been developed in the frame of the {31P,29Si} spin pair. The potential of these techniques has been demonstrated using model compounds including crystalline silicophosphate phases (Si5O(PO4)6 and various SiP2O7 polymorphs). Spatial interactions as well as through-bond connectivities were established. Evaluation of isotropic 2 JP-O-Si coupling constants has been established by careful analysis of the HMQC and INEPT build-up curves under fast MAS. The efficiency of the 31P →29Si CP MAS experiment for the detailed characterization of Si-O-P mesoporous materials (at low temperature) was demonstrated. The incorporation of P atoms in the silica network has been proved unambiguously. Such materials could be appropriate for biocompatibility purposes.
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https://hal.archives-ouvertes.fr/hal-00267398
Contributor : Dominique Massiot <>
Submitted on : Thursday, March 27, 2008 - 1:28:22 PM
Last modification on : Tuesday, November 24, 2020 - 10:38:04 PM

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C. Coelho, T. Azais, Christian Bonhomme, L. Bonhomme-Coury, C. Boissière, et al.. Efficiency of dipolar and J-derived solid-state NMR techniques for a new pair of nuclei {31P,29Si}. Towards the characterization of Si-O-P mesoporous materials. Comptes Rendus Chimie, Elsevier Masson, 2008, 11, pp.387-397. ⟨10.1016/j.crci.2007.09.012⟩. ⟨hal-00267398⟩

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