Isostructural phase transition, quasielastic neutron scattering and magnetic resonance studies of a bistable dielectric ion-pair crystal [(CH3)2NH2]2KCr(CN)6

2019 ◽  
Vol 48 (13) ◽  
pp. 4190-4202 ◽  
Author(s):  
M. Rok ◽  
G. Bator ◽  
B. Zarychta ◽  
B. Dziuk ◽  
J. Repeć ◽  
...  
Keyword(s):  
Phase Transition ◽  
Magnetic Resonance ◽  
Neutron Scattering ◽  
Ion Pair ◽  
Magnetic Resonance Studies ◽  
Ferroelastic Phase Transition ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering ◽  
Isostructural Phase Transition

Ferroelastic phase transition in novel HOIP crystal with dielectric switchable properties.

NH3 reorientation in phases I, II, and III of Ni(NH3)6(NO3)2

1988 ◽  
Vol 66 (4) ◽  
pp. 692-697 ◽  
Author(s):  
Gordon J. Kearley ◽  
Herma Blank
Keyword(s):  
Phase Transition ◽  
Neutron Scattering ◽  
Strong Interaction ◽  
Rotational Motion ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Phase Iii ◽  
Single Type ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering

The inelastic neutron scattering (INS) spectra of rotational tunnelling and librations of NH3 ligands in phase III of Ni(NH3)6(NO3)2 are not consistent with a rotational hindrance potential containing only cos [Formula: see text] terms owing to strong interaction between neighboring cations. This type of interaction, and motion of the whole cation, also influences the classical reorientational motions involving displacement of the H atoms, where the overall radius of rotation is consistently greater than the 0.9 Å expected for isolated NH3 rotors. Quasielastic neutron scattering (QNS) suggests that in phase III there are two sublattices of cations, one of which becomes completely disordered (with respect to the NH3 rotors) at the III–II phase transition. Disorder of the second sublattice marks the II–I transformation where only a single type of rotational motion is found.

scholarly journals Exploring molecular reorientations in amorphous and recrystallized felodipine at the microscopic level

RSC Advances ◽  
2020 ◽  
Vol 10 (61) ◽  
pp. 37346-37357
Author(s):  
A. Pajzderska ◽  
J. Jenczyk ◽  
J. P. Embs ◽  
J. Wąsicki
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Neutron Scattering ◽  
Experimental Methods ◽  
Microscopic Level ◽  
Nmr Relaxometry ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering

Molecular reorientations were studied in amorphous, partially and fully recrystallized felodipine using a set of experimental methods: high-resolution solid-state nuclear magnetic resonance (NMR), relaxometry NMR and quasielastic neutron scattering (QENS).

Calometry, proton magnetic resonance and quasielastic neutron scattering studies of [Mg(NH3)6] (NO3)2

Physica B+C ◽  
1983 ◽  
Vol 122 (3) ◽  
pp. 315-320 ◽  
Author(s):  
J.A. Janik ◽  
J.M. Janik ◽  
A. Migdał-Mikuli ◽  
E. Mikuli ◽  
M. Rachwalska ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Neutron Scattering ◽  
Proton Magnetic Resonance ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering

Reorientations in [Mg(H2O)6](ClO4)2 studied with proton magnetic resonance and quasielastic neutron scattering

Physica B+C ◽  
1981 ◽  
Vol 106 (2) ◽  
pp. 195-199 ◽  
Author(s):  
I. Svare ◽  
B.O. Fimland ◽  
K. Otnes ◽  
J.A. Janik ◽  
J.M. Janik ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Neutron Scattering ◽  
Proton Magnetic Resonance ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering
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