| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Katrusiak, Andrzej
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (30/30 displayed)
- 2024High-pressure observation of elusive iodoplumbic acid in different hydronium-hydrate solid formscitations
- 2024Temperature and volumetric effects on structural and dielectric properties of hybrid perovskitescitations
- 2024Unprecedented Richness of Temperature‐ and Pressure‐Induced Polymorphism in 1D Lead Iodide Perovskitecitations
- 2024Structural insight into piezo-solvatochromism of Reichardt's dyecitations
- 2023Helical model of compression and thermal expansioncitations
- 2023Engineering anomalous elastic properties of coordination polymers and their amorphization by employing flexible linkerscitations
- 2022Pressure-Driven Phase Transition in Two-Dimensional Perovskite MHy2PbBr4citations
- 2022Pressure-Driven Phase Transition in Two-Dimensional Perovskite MHy2PbBr4
- 2021Thermostructural and Elastic Properties of PbTe and Pb0.884Cd0.116Te: A Combined Low-Temperature and High-Pressure X-ray Diffraction Study of Cd-Substitution Effectscitations
- 2021Thermostructural and Elastic Properties of PbTe and Pb 0.884 Cd 0.116 Te: A Combined Low-Temperature and High-Pressure X-ray Diffraction Study of Cd-Substitution Effectscitations
- 2020High-pressure preference for reduced water content in porous zinc aspartate hydrates
- 2019Vitrification and New Phases in the Water:Pyrimidine Binary Eutectic Systemcitations
- 2019Dynamic Resolution of Piezosensitivity in Single Crystals of π-Conjugated Moleculescitations
- 2019Band Gap Engineering in MASnBr3and CsSnBr3 Perovskites: Mechanistic Insights through the Application of Pressurecitations
- 2019Environment-Controlled Postsynthetic Modifications of Iron Formate Frameworkscitations
- 2018Zone-Collapse Amorphization Mimicking the Negative Compressibility of a Porous Compoundcitations
- 2018A giant 2-dimensional dielectric response in a compressed hydrogen-bonded hybrid organic-inorganic saltcitations
- 2018Framework and coordination strain in two isostructural hybrid metal-organic perovskitescitations
- 2017Pressure inverse solubility and polymorphism of an edible γ-cyclodextrin-based metal-organic frameworkcitations
- 2016Mechanism of Pressure-Induced Phase Transitions, Amorphization, and Absorption-Edge Shift in Photovoltaic Methylammonium Lead Iodidecitations
- 2015Compressed Arsenolite As4O6 and Its Helium Clathrate As4O6·2Hecitations
- 2015Cascade of High-Pressure Transitions of Claudetite II and the First Polar Phase of Arsenic(III) Oxidecitations
- 2015Conformational conversion of 4,4′-bipyridinium in a hidden high-pressure phasecitations
- 2014Pressure-induced solvate crystallization of 1,4-Diazabicyclo[2.2.2]octane perchlorate with methanolcitations
- 2014Quasistatic disorder of NH⋯N bonds and elastic-properties relationship in 2-phenylimidazole crystalscitations
- 2008X-ray, FT-IR, ESI MS and PM5 studies of Schiff base of gossypol with allylamine and its complexes with alkali metal cations and perchlorate anioncitations
- 2008Anomalous protonic-glass evolution from ordered phase in NH...N hydrogen-bonded dabcoHBF ferroelectriccitations
- 2006Molecular interactions in crystalline dibromomethane and diiodomethane, and the stabilities of their high-pressure and low-temperature phasescitations
- 2006Disproportionation of pyrazine in NH<sup>+</sup>⋯ hydrogen-bonded complexes: New materials of exceptional dielectric responsecitations
- 2001Microscopic instabilities related to H<inf>3</inf>O<sup>+</sup> dynamics in monoguanidinium dioxonium trinitratecitations
Places of action
| Organizations | Location | People |
|---|
article
Anomalous protonic-glass evolution from ordered phase in NH...N hydrogen-bonded dabcoHBF ferroelectric
Abstract
<p>Dielectric properties, spontaneous polarization, and phase transitions of the NH+N bonded ferroelectric dabcoHBF<sub>4</sub> (i.e., l,4-diazabicyclo[2.2. 2]octane tetrafluoroborate, [C<sub>6</sub>H<sub>13</sub>N<sub>2</sub>]+.BF <sub>4</sub><sup>-</sup>) have been related to one-dirnensional arrangement of the cations and to their conformational properties. The onset of conformational transformation lowering the symmetry of the cations, rearrangement of the anions, and proton disordering in NH<sup>+</sup>.N hydrogen bonds, linking the cations into linear chains, lead to a ferroelectric-ferroelectric phase transition at T<sub>23</sub> = 153 K. A weak coupling between the protonic and anionic sites in dabcoHBF<sub>4</sub> results in the formation of distinct phase-diagram regions: the high-temperature paraelectric phase with disordered protons, the intermediate ferroelectric phase with the protons ordered, and the low-temperature ferroelectric phase where the protons become disordered again. The lowest temperature phase remains ferroelectric owing to the ionic displacements, while the protons assume the glass state. In this phase the H<sup>+</sup> transfers involve local formation of neutral, monocationic, and dicationic species. Such an anomalous formation of protonic glass state from the ordered phase depends on the subtle structural features pertaining to the proton transfers in bistable hydrogen bonds. In paraelectric phase I, between the mp and T<sub>12</sub> = 374 K, the anions are orientationally disordered, the protons are disordered in the hydrogen bonds and the cations rotate about the [z] direction; in ferroelectric phase II below T<sub>12</sub>, the protons and cations order, the dabco cations assume a planar conformation of ethylene bridges, and the anions exhibit a residual temperature-dependent gradual ordering (two 80:20 occupied sites of the anion are still observed at 332 K); and in ferroelectric phase III below T<sub>23</sub>, the cations assume left- and right-twisted propeller conformations and the anions are ordered but the protons become disordered in the hydrogen bonds.© 2008 American Chemical Society.</p>