Dynamics of a glycine molecule in a new ferroelectric glycine phosphite studied by proton NMR

The second moments of the proton magnetic resonance lines and relaxation times in the laboratory frame T 1, in polycrystalline glycinum phosphite (NH + 3CH 2COOH)(H 2PO − 3) were measured. The proton spin-lattice relaxation measurements reveal one minimum due to the C 3 reorientations of the amino g...

Full description

Saved in:
Bibliographic Details
Published in:Solid state communications 1998-09, Vol.108 (3), p.189-192
Main Authors: Tritt-Goc, J., Piślewski, N., Szczepańska, L., Goc, R.
Format: Article
Language:English
Subjects:
A. ferroelectrics
B. crystal growth
C. nuclear magnetic resonance
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
D. spin dynamics
Exact sciences and technology
Lattice dynamics
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Nuclear magnetic resonance and relaxation
Other topics in lattice dynamics
Physics
Relaxation effects
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The second moments of the proton magnetic resonance lines and relaxation times in the laboratory frame T 1, in polycrystalline glycinum phosphite (NH + 3CH 2COOH)(H 2PO − 3) were measured. The proton spin-lattice relaxation measurements reveal one minimum due to the C 3 reorientations of the amino groups of glycinum cations. Analysis of the relaxation data yields the activation energy barrier of 28.7 kJ mol −1. Second moment measurements confirm the phase transition at T c =224 K known from different studies. The molecular mechanism of the order–disorder phase transition is discussed.
ISSN:0038-1098
1879-2766
DOI:10.1016/S0038-1098(98)00331-7