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71 Ga- 77 Se connectivities and proximities ...
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Document type :
Article dans une revue scientifique
DOI :
10.1016/j.jmr.2017.07.009
Permalink :
http://hdl.handle.net/20.500.12210/12728
Title :
71 Ga- 77 Se connectivities and proximities in gallium selenide crystal and glass probed by solid-state NMR
Author(s) :
Nagashima, Hiroki [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Trebosc, Julien [Auteur] refId
Calvez, Laurent [Auteur]
Pourpoint, Frederique [Auteur] refId
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Mear, François [Auteur] orcid refId
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Lafon, Olivier [Auteur] refId
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Amoureux, Jean-Paul [Auteur] refId
Journal title :
Journal of Magnetic Resonance
Volume number :
282
Pages :
71-82
Publication date :
2017-09
HAL domain(s) :
Chimie/Chimie inorganique
English abstract : [en]
We introduce two-dimensional (2D) 71Ga-77Se through-bond and through-space correlation experiments. Such correlations are achieved using (i) the J-mediated Refocused Insensitive Nuclei Enhanced by Polarization Transfer ...
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We introduce two-dimensional (2D) 71Ga-77Se through-bond and through-space correlation experiments. Such correlations are achieved using (i) the J-mediated Refocused Insensitive Nuclei Enhanced by Polarization Transfer (J-RINEPT) method with 71Ga excitation and 77Se Carr-Purcell-Meiboon-Gill (CPMG) detection, as well as (ii) the J- or dipolar-mediated Hetero-nuclear Multiple-Quantum Correlation (J- or D-HMQC) schemes with 71Ga excitation and quadrupolar CPMG (QCPMG) detection. These methods are applied to the crystalline β-Ga2Se3 and the 0.2Ga2Se3-0.8GeSe2 glass. Such glass leads to a homogeneous and reproducible glass–ceramic, which is a good alternative to single-crystalline Ge and polycrystalline ZnSe materials for making lenses transparent in the IR range for thermal imaging applications. We show that 2D 71Ga-77Se correlation experiments allow resolving the 77Se signals of molecular units, which are not resolved in the 1D 77Se CPMG spectrum. Additionally, the build-up curves of the J-RINEPT and the J-HMQC experiments allow the estimate of the 71Ga-77Se J-couplings via one and three-bonds in the three-dimensional network of β-Ga2Se3. Furthermore, these build-up curves show that the one-bond 1J71Ga-77Se couplings in the 0.2Ga2Se3-0.8GeSe2 glass are similar to those measured for β-Ga2Se3. We also report 2D 71Ga Satellite Transition Magic-Angle Spinning (STMAS) spectrum of β-Ga2Se3 using QCPMG detection at high magnetic field and high Magic-Angle Spinning frequency using large radio frequency field. Such spectrum allows separating the signal of β-Ga2Se3 and that of an impurity.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
ENSCL
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Collections :
  • Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Research team(s) :
RMN et matériaux inorganiques (RM2I)
Submission date :
2019-09-25T14:06:22Z
Université de Lille

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