NMR Study of Cation Motions in Ferroic [C(NH2)3]3Bi2Br9-Reference-Cited by-同舟云学术

NMR Study of Cation Motions in Ferroic [C(NH2)3]3Bi2Br9

Published:2000-07-01 Issue:6-7 Volume:55 Page:570-574
ISSN:1865-7109
Container-title:Zeitschrift für Naturforschung A
language:
Short-container-title:

Author:

Grottel M.¹,Paja̡ka Z.²,Jakubasb R.²

Affiliation:

1. 1Department of Physics, Academy of Agriculture, 60-637 Poznan. Poland

2. 2Department of Chemistry, University of Wroclaw, 50-383 Wroclaw, Poland

Abstract

The proton NMR second moment and spin-lattice relaxation time of polycrystalline [C(NH2)3]3Bi2Br9 were studied in a wide-temperature range. Dynamical inequivalence of two crystallographically different guanidinium cations has been revealed . The C3 reorientation of the two types of cations was found to be hindered by different potential barriers (25.1 kJ/mol and 34.7 kJ/mol). At higher temperatures an overall reorientation of the cations was revealed. The existence and order-disorder character of the phase transitions at 333, 350, 415, and 425 K have been confirmed.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry,General Physics and Astronomy,Mathematical Physics

Link

https://www.degruyter.com/document/doi/10.1515/zna-2000-6-702/pdf

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1. 1H NMR Studies on the Cation Motions in Crystalline Cadmium Bromide Complexes [C(NH2)3]Cd2Br5, [(CH3)3NH]3Cd2Br7, and [i-C3H7NH3]CdBr3;Zeitschrift für Naturforschung B;2010-04-01

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4. 1H NMR study of dynamical inequivalence of cations in [C(NH2)3]3Sb2Cl9;Solid State Communications;2001-09

5. Structure and phase transitions in guanidinium halogenobismuthates(III);Journal of Molecular Structure;2001-08