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 |
Externí odkaz: |