1 H and 19 F NMR Study of Ion Dynamics in tris‐Guanidinium Heptafluorozirconate [C(NH 2 ) 3 ] 3 ZrF 7

Autor: M. Grottel, A. Kozak, Z. Paja¸k
Rok vydání: 1998
Předmět:
Zdroj: physica status solidi (b). 207:333-339
ISSN: 1521-3951
0370-1972
DOI: 10.1002/(sici)1521-3951(199806)207:2<333::aid-pssb333>3.0.co;2-#
Popis: Proton and fluorine NMR spectra and spin-lattice relaxation times were measured for polycrystalline tris-guanidinium heptafluorozirconate in a wide temperature range. In-plane C 3 reorientation of the guanidinium cation hindered by the energy barrier E a = 48.4 kJ/mol and isotropic reorientation of the fluoro-anion with the activation energy E a = 38.8 kJ/mol have been revealed. At 467 K a solid-solid and at 541 K a solid-liquid phase transition have been discovered.
Databáze: OpenAIRE