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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Szafrański, Marek
Adam Mickiewicz University in Poznań
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024Structural and optical properties of methylhydrazinium lead bromide perovskites under pressurecitations
- 2024Polyiodides of amino acids. Betainium triiodidecitations
- 2023Electrical polarization switching in bulk single-crystal GaFeO$_3$
- 2022Above-room-temperature ferroelectricity and piezoelectric activity of dimethylglycinium-dimethylglycine chloridecitations
- 2019Vitrification and New Phases in the Water:Pyrimidine Binary Eutectic Systemcitations
- 2019Band Gap Engineering in MASnBr3and CsSnBr3 Perovskites: Mechanistic Insights through the Application of Pressurecitations
- 2018A giant 2-dimensional dielectric response in a compressed hydrogen-bonded hybrid organic-inorganic saltcitations
- 2016Mechanism of Pressure-Induced Phase Transitions, Amorphization, and Absorption-Edge Shift in Photovoltaic Methylammonium Lead Iodidecitations
- 2014Effect of high pressure on the supramolecular structures of guanidinium based ferroelectricscitations
- 2014Quasistatic disorder of NH⋯N bonds and elastic-properties relationship in 2-phenylimidazole crystalscitations
- 2014Origin of metastable properties in the ferroelectric phase of tetraguanidinium dichloro-sulfatecitations
- 2013Strong negative thermal expansion and relaxor ferroelectricity driven by supramolecular patternscitations
- 2011Crystal structures, phase transitions, and pressure-induced ferroelectricity in [C(NH<inf>2</inf>)<inf>3</inf>]<inf>5</inf>SO <inf>4</inf>(SO<inf>3</inf>-OC<inf>2</inf>H<inf>5</inf>)<inf>2</inf>Fcitations
- 2008Anomalous protonic-glass evolution from ordered phase in NH...N hydrogen-bonded dabcoHBF ferroelectriccitations
- 2007Impossibility of pressure-induced crossover from ferroelectric to nonergodic relaxor state in a Pb (Mg1 3 Nb2 3) 0.7 Ti0.3 O3 crystal: Dielectric spectroscopic studycitations
- 2007Crystal structure and phase transitions in perovskite-like C(NH<inf>2</inf>)<inf>3</inf>SnCl<inf>3</inf>citations
- 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
- 2005Structural implications of anomalous thermal expansion and glass-like dielectric response in pyridinium halogenoauratescitations
- 2004High-pressure peculiarities in compositionally ordered Pb(Sc <inf>1/2</inf>Nb<inf>1/2</inf>)O<inf>3</inf>citations
- 2002Dielectric and structural properties of dipyridinium iodide triiodidecitations
- 2001Microscopic instabilities related to H<inf>3</inf>O<sup>+</sup> dynamics in monoguanidinium dioxonium trinitratecitations
- 2000Pressure-induced decoupling of the order-disorder and displacive contributions to the phase transition in diguanidinium tetrachlorostannatecitations
Places of action
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article
Structural implications of anomalous thermal expansion and glass-like dielectric response in pyridinium halogenoaurates
Abstract
<p>The crystals of [C<sub>5</sub>NH<sub>6</sub>],<sup>+</sup>[AuCl <sub>4</sub>]<sup>-</sup>, [C<sub>5</sub>NH<sub>6</sub>]<sup>+</sup>[AuBr <sub>4</sub>]<sup>-</sup>, and [C<sub>5</sub>NH<sub>6</sub>] <sup>+</sup>[AuI<sub>4</sub>]<sup>-</sup>- have been studied by single-crystal X-ray diffraction and dielectric spectroscopy. The structures of the chloride and bromide are isosymmetric, with the monoclinic space group C2/m, and both are built of sheets of pyridinium cations and tetrahalogenoaurate anions alternately arranged in the direction [001]. The anomalous thermal expansion and dielectric response characteristic of dipolar glass formation observed in these compounds have been interpreted in terms of the development of the short-range dipolar order and the competition between the ferroelectric and antiferroelectric interactions. The frustration of dipolar interactions, leading to glassy behavior, results from the strongly anisotropic properties of the layered crystal structure. These features have not been observed for [C <sub>5</sub>NH<sub>6</sub>]<sup>+</sup>[AuI<sub>4</sub>]<sup>-</sup>, which crystallizes in the space group P2<sub>1</sub>/c and exhibits a nonlayered structural packing because of the larger size of the anion. © 2005 American Chemical Society.</p>