Pretransitional Effects of the Isotropic Liquid–Plastic Crystal Transition
We report on strong pretransitional effects across the isotropic liquid–plastic crystal melting temperature in linear and nonlinear dielectric response. Studies were carried out for cyclooctanol (C<sub>8</sub>H<sub>16</sub>O) in the unprecedented range of temperatures 120 K &...
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| Format: | Article |
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MDPI AG
2021-01-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/26/2/429 |
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| author | Aleksandra Drozd-Rzoska Szymon Starzonek Sylwester J. Rzoska Joanna Łoś Zdravko Kutnjak Samo Kralj |
| author_facet | Aleksandra Drozd-Rzoska Szymon Starzonek Sylwester J. Rzoska Joanna Łoś Zdravko Kutnjak Samo Kralj |
| author_sort | Aleksandra Drozd-Rzoska |
| collection | DOAJ |
| description | We report on strong pretransitional effects across the isotropic liquid–plastic crystal melting temperature in linear and nonlinear dielectric response. Studies were carried out for cyclooctanol (C<sub>8</sub>H<sub>16</sub>O) in the unprecedented range of temperatures 120 K < <i>T</i> < 345 K. Such pretransitional effects have not yet been reported in any plastic crystals. Results include the discovery of the experimental manifestation of the Mossotti Catastrophe behavior, so far considered only as a hypothetical paradox. The model interpretations of experimental findings are proposed. We compare the observed pretransitional behavior with the one observed in octyloxycyanobiphenyl (8OCB), typical liquid crystal (LC), displaying a reversed sequence of phase transitions in orientational and translational degrees of order on varying temperature. Furthermore, in its nematic phase, we demonstrate first-ever observed temperature-driven crossover between regions dominated by isotropic liquid and smectic A pretransitional fluctuations. We propose a pioneering minimal model describing plastic crystal phase behavior where we mimic derivation of classical Landau-de Gennes-Ginzburg modeling of Isotropic-Nematic-Smectic A LC phase behavior. |
| first_indexed | 2024-03-09T04:41:26Z |
| format | Article |
| id | doaj.art-e3ea756ada6b46afb18c24ab28142bf0 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T04:41:26Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-e3ea756ada6b46afb18c24ab28142bf02023-12-03T13:21:16ZengMDPI AGMolecules1420-30492021-01-0126242910.3390/molecules26020429Pretransitional Effects of the Isotropic Liquid–Plastic Crystal TransitionAleksandra Drozd-Rzoska0Szymon Starzonek1Sylwester J. Rzoska2Joanna Łoś3Zdravko Kutnjak4Samo Kralj5Institute of High Pressure Physics Polish Academy of Sciences, ul. Sokołowska 29/37, 01-142 Warsaw, PolandInstitute of High Pressure Physics Polish Academy of Sciences, ul. Sokołowska 29/37, 01-142 Warsaw, PolandInstitute of High Pressure Physics Polish Academy of Sciences, ul. Sokołowska 29/37, 01-142 Warsaw, PolandInstitute of High Pressure Physics Polish Academy of Sciences, ul. Sokołowska 29/37, 01-142 Warsaw, PolandCondensed Matter Physics Department, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, SloveniaCondensed Matter Physics Department, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, SloveniaWe report on strong pretransitional effects across the isotropic liquid–plastic crystal melting temperature in linear and nonlinear dielectric response. Studies were carried out for cyclooctanol (C<sub>8</sub>H<sub>16</sub>O) in the unprecedented range of temperatures 120 K < <i>T</i> < 345 K. Such pretransitional effects have not yet been reported in any plastic crystals. Results include the discovery of the experimental manifestation of the Mossotti Catastrophe behavior, so far considered only as a hypothetical paradox. The model interpretations of experimental findings are proposed. We compare the observed pretransitional behavior with the one observed in octyloxycyanobiphenyl (8OCB), typical liquid crystal (LC), displaying a reversed sequence of phase transitions in orientational and translational degrees of order on varying temperature. Furthermore, in its nematic phase, we demonstrate first-ever observed temperature-driven crossover between regions dominated by isotropic liquid and smectic A pretransitional fluctuations. We propose a pioneering minimal model describing plastic crystal phase behavior where we mimic derivation of classical Landau-de Gennes-Ginzburg modeling of Isotropic-Nematic-Smectic A LC phase behavior.https://www.mdpi.com/1420-3049/26/2/429plastic crystalmeltingpretransitional behaviornonlinear dielectric effectdielectric constantMossotti Catastrophe |
| spellingShingle | Aleksandra Drozd-Rzoska Szymon Starzonek Sylwester J. Rzoska Joanna Łoś Zdravko Kutnjak Samo Kralj Pretransitional Effects of the Isotropic Liquid–Plastic Crystal Transition Molecules plastic crystal melting pretransitional behavior nonlinear dielectric effect dielectric constant Mossotti Catastrophe |
| title | Pretransitional Effects of the Isotropic Liquid–Plastic Crystal Transition |
| title_full | Pretransitional Effects of the Isotropic Liquid–Plastic Crystal Transition |
| title_fullStr | Pretransitional Effects of the Isotropic Liquid–Plastic Crystal Transition |
| title_full_unstemmed | Pretransitional Effects of the Isotropic Liquid–Plastic Crystal Transition |
| title_short | Pretransitional Effects of the Isotropic Liquid–Plastic Crystal Transition |
| title_sort | pretransitional effects of the isotropic liquid plastic crystal transition |
| topic | plastic crystal melting pretransitional behavior nonlinear dielectric effect dielectric constant Mossotti Catastrophe |
| url | https://www.mdpi.com/1420-3049/26/2/429 |
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