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@ARTICLE{Rok:863682,
author = {Rok, M. and Bator, G. and Zarychta, B. and Dziuk, B. and
Repeć, J. and Medycki, W. and Zamponi, M. and Usevičius,
G. and Šimėnas, M. and Banys, J.},
title = {{I}sostructural phase transition, quasielastic neutron
scattering and magnetic resonance studies of a bistable
dielectric ion-pair crystal [({CH}3)2 {NH}2]2 {KC}r({CN})6},
journal = {Dalton transactions},
volume = {48},
number = {13},
issn = {0300-9246},
address = {London},
publisher = {Soc.},
reportid = {FZJ-2019-03688},
pages = {4190 - 4202},
year = {2019},
abstract = {We have synthesised and characterised a novel
organic–inorganic hybrid crystal, [(CH3)2NH2]2KCr(CN)6.
The thermal DSC, TMA, DTG and DTA analyses indicate two
solid-to-solid structural phase transitions (PTs). According
to the X-ray diffraction experiments, the first PT at 220 K
is isostructural, since it does not involve a change of the
space group. This transition occurs between the states,
where the (CH3)2NH2+ cations are orientationally disordered
and ordered (frozen). The other reversible PT at 481 K leads
to a melt-like phase similar to the one observed in plastic
crystals or polar liquids. Dielectric spectroscopy has been
used to characterise the switching properties of the dipole
moments in the vicinity of the PTs. Continuous-wave electron
paramagnetic resonance spectroscopy was employed to
investigate the effect of ordering on the local environment
of the Cr3+ ions. We have also applied the quasielastic
neutron scattering (QENS) technique as well as 1H NMR
spectroscopy to measure the dynamics of the (CH3)2NH2+
cations residing in the inorganic framework.},
cin = {JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)SPHERES-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30821302},
UT = {WOS:000463676700010},
doi = {10.1039/C8DT05082A},
url = {https://juser.fz-juelich.de/record/863682},
}