The structural dynamics in the proton-conducting imidazolium oxalate

The 1H spin -lattice relaxation times and high-resolution solid-state nuclear magnetic resonance (NMR) under fast magic spinning were used to study the structural dynamics in the proton-conducting material imidazolium oxalate. The measurements provide evidence for the ordered and disordered domains...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2008-12, Vol.20 (50), p.505101-505101 (7)
Main Authors: Rachocki, Adam, Pogorzelec-Glaser, Katarzyna, Pietraszko, Adam, Tritt-Goc, Jadwiga
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Diffusion in solids
Exact sciences and technology
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Nuclear magnetic resonance and relaxation
Physics
Self-diffusion and ionic conduction in nonmetals
Transport properties of condensed matter (nonelectronic)
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Summary:The 1H spin -lattice relaxation times and high-resolution solid-state nuclear magnetic resonance (NMR) under fast magic spinning were used to study the structural dynamics in the proton-conducting material imidazolium oxalate. The measurements provide evidence for the ordered and disordered domains within the studied material. The two components drastically differ in their 1H spin -lattice relaxation times and 1H -13C cross-polarization magic-angle-spinning (CP/MAS) spectra. The coalescence phenomenon of the resonances of the basal carbons of the imidazole ring undergoing a reorientation is observed only for mobile molecules in the disordered domains. Therefore, only these molecules can be responsible for proton conductivity allowing for the Grotthus mechanism.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/20/50/505101