NMR studies of Phase Transitions

C Odin - Annual Reports on NMR Spectroscopy, 2006 - Elsevier
Understanding the mechanisms of transformations between different polymorphs, that is
between phases of different symmetries at constant atomic and molecular composition, has …

A phenomenological study on ferroelectric pyridinium tetrafluoroborate (C5NH6) BF4

A Kiraci - Thermochimica Acta, 2019 - Elsevier
The temperature dependence of the specific heat CV of (C 5 NH 6) BF 4 was analyzed
according to a power law formula with a critical exponent α deduced from the compressible …

Ferroelectricity of pyridinium perchlorate, a molecular level point of view

D Vujosevic, K Müller, E Roduner - The Journal of Physical …, 2006 - ACS Publications
The behavior of ferroelectric and thermodynamic parameters of pyridinium perchlorate
(PyClO4) was simulated based on experimental NMR data and properties of the individual …

Cation dynamics in pyridinium nitrate and bis-thiourea pyridinium nitrate inclusion compound studied by 2H NMR spectroscopy

A Pajzderska, Z Fojud, R Goc… - Journal of Physics …, 2007 - iopscience.iop.org
Abstract 2 H NMR (nuclear magnetic resonance) line-shape measurements were performed
over a wide temperature range for pyridinium nitrate (d 5 PyH) NO 3 and bis-thiourea …

Ferroelectricity of inclusion compounds of thiourea with pyridinium iodide and nitrate

A Pajzderska, E Collet, P Czarnecki… - The Journal of Physical …, 2009 - ACS Publications
The character of phase transitions in the inclusion compounds of thiourea with pyridinium
iodide and nitrate has been analyzed, and a model of ferroelectricity of these compounds …

Temperature Dependence of Spontaneous Polarization in Order−Disorder Pyridinium Periodate Extracted from 2H NMR Data

J Wasicki, A Pajzderska, Z Fojud - The Journal of Physical …, 2008 - ACS Publications
On the basis of occupancy factor data for nitrogen atoms in the pyridinium cation obtained
from the structural study of PyHIO4 by neutron diffraction, 4 the shape of the potential for …

Polarisation and energy barriers in ferroelectric pyridinium perchlorate

J Wąsicki, Z Fojud, P Czarnecki, S Jurga - Ferroelectrics, 2008 - Taylor & Francis
Polycrystalline sample of pyridinium perchlorate was studied by NMR method in the
temperature range from 133 to 313 K. Assuming a reorientation of pyridinium cations over …

High-pressure-induced phase transitions in the ferroelectric bis-thiourea pyridinium iodide inclusion compound

P Bilski, L Bobrowicz-Sarga, P Czarnecki… - Journal of Physics …, 2008 - iopscience.iop.org
The effect of temperature and pressure on physical properties of the ferroelectric bis-
thiourea pyridinium iodide inclusion compound has been studied by dielectric spectroscopy …

Dynamics in molecular and molecular-ionic crystals: A combined experimental and molecular simulation study of reorientational motions in benzene, pyridinium …

A Pajzderska, MA Gonzalez, J Wąsicki - The Journal of Chemical …, 2013 - pubs.aip.org
Molecular dynamics (MD) simulations for crystalline benzene (C 6 H 6), pyridinium iodide [C
5 NH 6]+ I−, and pyridinium nitrate [C 5 NH 6]+ NO 3− have been performed as a function of …

[PDF][PDF] Domain structure and birefringence in pyridinium perchlorate and pyridinium fluoroborate single crystal

B Kosturek, Z Czapla - Acta Physica Polonica A, 2004 - bibliotekanauki.pl
Pyridinium perchlorate and pyridinium fluoroborate were grown and their successive phase
transitions were studied by means of polarized microscopic observations and …