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87Sr, 119Sn, 127I Single and {1H/19F}-Double Resonance Solid-State NMR Experiments: Application to Inorganic Materials and Nanobuilding Blocks

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  • D. Laurencin
  • F. Ribot
  • C. Gervais
  • A.J. Wright
  • A.R. Baker
  • L. Campayo
  • J.V. Hanna
  • D. Iuga
  • M.E. Smith
  • J.-M. Nedelec
  • G. Renaudin
  • C. Bonhomme
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<mark>Journal publication date</mark>16/09/2016
<mark>Journal</mark>ChemistrySelect
Issue number15
Volume1
Number of pages11
Pages (from-to)4509-4519
Publication StatusPublished
<mark>Original language</mark>English

Abstract

87Sr, 127I and 119Sn wideline NMR spectroscopy was successfully applied to inorganic and hybrid materials: (i) Sr derivatives of medicinal interest (Sr-malonate, Sr-pyrophosphates, mixed Ca,Sr-fluoroapatites); (ii) apatitic structures acting as host matrices for iodine; and (iii) Sn-derived oxo-clusters which can be used as inorganic nanobuilding blocks. The BRAIN (BRoadband Adiabatic INversion) CP (Cross Polarization) approach (by Schurko et al.) was applied to a non integer quadrupolar nucleus (87Sr, I=9/2). The sequence was used in combination with WURST (Wideband Uniform-Rate Smooth-Truncation) QCPMG (Quadrupolar Carr-Purcell Meiboom-Gill) for optimal sensitivity. We showed that 127I WURST QCPMG experiments were sufficiently sensitive to allow rapid characterization of the incorporation of iodide (I−) anions in lead vanadate/phosphate apatites, and that 127I acted as a sensitive probe for the description of local disorder. 1H/19F → 119Sn BRAIN CP was successfully applied to the detailed characterization of tin oxo-clusters, using 1H and 19F as spin baths. We demonstrated that BRAIN CP can be effectively used as a tool of spectral editing leading to the estimation of spatial proximities between 119Sn and 1H/19F nuclei. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim