Anion Reorientations and Cation Diffusion in Nanostructured Closo-Borates: NMR and Quasielastic Neutron Scattering Studies

The dynamical properties of sodium closo-borate NaCB 11 H 12 embedded into SiO 2 -based nanoporous scaffolds have been studied by nuclear magnetic resonance (NMR) and quasielastic neutron scattering (QENS) over wide temperature ranges. It has been found that a confinement of the closo-borate in nano...

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Bibliographic Details
Published in:Physics of metals and metallography 2024-03, Vol.125 (3), p.307-312
Main Authors: Skripov, A. V., Babanova, O. A., Skoryunov, R. V., Soloninin, A. V.
Format: Article
Language:English
Subjects:
Anions
Borates
Cations
Chemistry and Materials Science
Diffusion
Low temperature
Materials Science
Metallic Materials
Neutron scattering
NMR
Nuclear magnetic resonance
Order disorder
Phase Transformations
Phase transitions
Resonance scattering
Silicon dioxide
Structure
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Summary:The dynamical properties of sodium closo-borate NaCB 11 H 12 embedded into SiO 2 -based nanoporous scaffolds have been studied by nuclear magnetic resonance (NMR) and quasielastic neutron scattering (QENS) over wide temperature ranges. It has been found that a confinement of the closo-borate in nanopores suppresses the order-disorder phase transition, retaining the orientationally disordered phase with high reorientational mobility of the anions and high diffusive mobility of the cations down to low temperatures. This paper is based on the presentation at the RNIKS-2023 conference.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X23603050