Tuning of Ionic Liquid Crystal Properties by Combining Halogen Bonding and Fluorous Effect
| Autor: | Giancarlo Terraneo, Gabriella Cavallo, Giovanni Paolo Venuti, Tullio Pilati, Antonio Abate, Pierangelo Metrangolo, Giuseppe Resnati, Marta Rosati |
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| Přispěvatelé: | Cavallo, G., Abate, A., Rosati, M., Paolo Venuti, G., Pilati, T., Terraneo, G., Resnati, G., Metrangolo, P. |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Supramolecular chemistry 010402 general chemistry fluorous effect 01 natural sciences ionic liquids chemistry.chemical_compound liquid crystals Liquid crystal Lamellar structure liquid crystal ionic liquid Halogen bond 010405 organic chemistry General Chemistry self-assembly Acceptor 0104 chemical sciences Crystallography chemistry halogen bonding Ionic liquid Melting point Photovoltaics and Wind Energy fluorous effects Single crystal |
| Popis: | We report halogen bonded complexes between 1 polyfluoroalkyl 3 alkylimidazolium iodides and mono iodoperfluoroalkanes of different chain lengths or di iodoperfluorooctane. 19F NMR analyses revealed that the preferred stoichiometry between the donors and acceptors is 1 amp; 8201; amp; 8201;1 in the cases of the mono iodoperfluoroalkanes, and 2 amp; 8201; amp; 8201;1 with di iodoperfluorooctane, as a result of the monodentate behavior of the iodide anion halogen bond acceptor . Single crystal X ray diffraction analyses showed the presence of a perfluorinated superanion, which interdigitates with the cation fluorinated chains, favoring the formation of lamellar structures. All of the obtained supramolecular complexes exhibit enantiotropic liquid crystalline phases over a broad range of temperatures. Most of the obtained complexes show melting points lower than 100 amp; 8201; C, two of them being liquid at room temperature, thus representing a new family of fluorinated ionic liquid crystals |
| Databáze: | OpenAIRE |
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