Ferroelectric properties of pyridinium tetrafluoroborate

P Czarnecki, W Nawrocik, Z Pajak, J Wasicki - Physical Review B, 1994 - APS
The differential thermal analysis of a single crystal of pyridinium tetrafluoroborate was
performed revealing two solid-solid phase transitions at 205 and 240 K. The real part of the …

A Comparative Study of the Rotational Dynamics of PF6–Anions in the Crystals and Liquid States of 1-Butyl-3-methylimidazolium Hexafluorophosphate: Results from …

T Endo, H Murata, M Imanari… - The Journal of …, 2013 - ACS Publications
The rotational dynamics of the hexafluorophosphate anion (PF6–) in the crystalline and
liquid states of the archetypal room temperature ionic liquid (RTIL) 1-butyl-3 …

NMR studies of solid-state dynamics

D Kruk, A Privalov, W Medycki, C Uniszkiewicz… - Annual reports on NMR …, 2012 - Elsevier
NMR relaxometry has gained popularity in recent years, due to advances in experimental
methodology and theory. We present an overview of applications of NMR relaxometry (with …

Molecular reorientation and phase transition in pyridinium hexafluoroantimonate

A Kozak, J Wasicki, Z Pajak - Phase Transitions, 1996 - Taylor & Francis
The temperature dependence of 1H and 19F NMR second moment and spin lattice
relaxation times in high (v L= 60 MHz and low (B 1= 2 mT) magnetic fields allow one to …

An X-ray and NMR study of structure and ion motions in C (NH2) 3PF6

M Grottel, A Kozak, AE Koziol… - Journal of Physics …, 1989 - iopscience.iop.org
A single-crystal X-ray analysis has shown that guanidinium hexafluorophosphate C (NH 2) 3
PF 6 crystallises in the trigonal space group R3m, with a= 7.427 (3) AA, alpha= 67.89 (2) …

An X-ray and nuclear magnetic resonance study of structure and ion motions in (C (NH2) 3) 3AlF6

M Grottel, A Kozak, H Maluszyriska… - Journal of Physics …, 1992 - iopscience.iop.org
Abstract Guanidinium hexafluoroaluminate (C (NH 2) 3) 3 AlF 6 crystallizes in a cubic
system in the space group P2 1/a3, a= 13.953 (2) AA, Z= 8. The guanidinium cation does not …

The relationship between reorientational molecular motions and phase transitions in [Mg (H2O) 6](BF4) 2, studied with the use of 1H and 19F NMR and FT-MIR

E Mikuli, J Hetmańczyk, B Grad, A Kozak… - The Journal of …, 2015 - pubs.aip.org
A 1 H and 19 F nuclear magnetic resonance study of [Mg (H 2 O) 6](BF 4) 2 has confirmed
the existence of two phase transitions at T c1≈ 257 K and T c2≈ 142 K, detected earlier by …

Phase transition and complex motion of ions in pyridinium hexafluorophosphate

A Kozak, M Grottel, J Wąsicki, Z Pająk - physica status solidi (a), 1994 - Wiley Online Library
Proton and fluorine NMR second moments and spin‐lattice relaxation times are studied for
polycrystalline pyridinium hexafluorophosphate over a wide range of temperature. A solid …

Cation complex motion and hydrogen bonds in guanidinium nitrate

J Wasicki, M Grottel, A Kozak… - Journal of Physics …, 1994 - iopscience.iop.org
Proton NMR linewidths and second moments, and spin-lattice relaxation times in the
laboratory (12 and 60 MHz) and in rotating frames (H 1= 9* 10-4 T) were studied for …

An effect of deuteration on ion motions and hydrogen bondings in guanidinium tetrafluoroborate

J Wąsicki, M Grottel, A Kozak, Z Pająk - Zeitschrift für Naturforschung …, 1992 - degruyter.com
The fluorine spin-lattice relaxation time as well as NMR second moment for perdeuterated
guanidinium tetrafluoroborate were studied over a wide range of temperature. An analytical …