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Engineering of ion channels topology in self-assembled wedge-shaped amphiphiles by combination of temperature and solvent vapor treatmentстатья
- Авторы: Kseniia Grafskaia, Boris Zimka, Xiaomin Zhu, Denis Anokhin, Ivanov Dimitri A.
- Журнал: AIP Conference Proceedings
- Том: 1748
- Год издания: 2016
- DOI: 10.1063/1.4954361
- Аннотация: Supramolecular self-assembly is a convenient toolfor fine-tuningof thin-filmstructure and properties through adjustment ofintermolecular interactions. Designing anappropriate chemical structure together with selecting an optimal sample preparation protocol allows organizing wedge-shaped supramolecular building blocks in various mesophases with 1D-, 2D-or 3D-ordered systems of ion-conducting channels. The control of the topology of ion channels is crucial for the development ofnext-generationion conductors. Here we study an amphiphilic wedge-shaped molecule bearing a sulfonate group at the extremityof a bulky aromatic moietyand having a pyridinium counter-ion. This compound exhibits complexstructural transitionsas a function of temperature and under the action of solvent vapors. The evolutionof the thin-film structure was explored in situ by combination of polarizingoptical microscopy and grazing-incidence small-angle X-ray scattering. In vapors of alcohols at room temperature, the thin films reveal reversible monoclinic columnar-to-lamellar phase transition. During heating in the swollen state, the films transform to a gyroid phase with 3D bicontinuous networks of ion channels. In the presence of solvent vapors, the opposite transition to lamellar phase takes place at room temperature. Upon this treatment, the gyroid phase is stable over a wide temperature range, which opens a way to fabricate efficient ion conducting materials.
- Добавил в систему: Иванов Дмитрий Анатольевич