Interplay of ion-conduction and nanoscale self-assembly in amphiphilic Janus-Type hexa-peri-hexabenzocoronenes
Ionic discotic liquid crystals combine ion conduction with fluid, yet ordered, liquid crystal phases at ambient temperature, making them suitable nanomaterials for ion transport and energy storage. A series of Janus-type hexa-peri-hexabenzocoronenes (HBCs) with ionic (sulfonate) groups covalently bo...
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| Hauptverfasser: | , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
26 July 2024
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| In: |
ACS applied nano materials
Year: 2024, Jahrgang: 7, Heft: 14, Pages: 16256-16263 |
| ISSN: | 2574-0970 |
| DOI: | 10.1021/acsanm.4c02204 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/acsanm.4c02204
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| Verfasserangaben: | Svenja Weigold, Marianna Spyridakou, Ioannis Tzourtzouklis, Jan Freudenberg, Uwe H.F. Bunz, Klaus Müllen, and George Floudas |
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| 520 | |a Ionic discotic liquid crystals combine ion conduction with fluid, yet ordered, liquid crystal phases at ambient temperature, making them suitable nanomaterials for ion transport and energy storage. A series of Janus-type hexa-peri-hexabenzocoronenes (HBCs) with ionic (sulfonate) groups covalently bonded to the HBC core, and tetraalkylammonium counterions (sizes from 0.15 to 0.95 nm) are synthesized and investigated with respect to the self-assembly and ion dynamics. We find that the counterion size affects the nanoscale self-assembly and ionic conductivity in opposite ways. Smaller counterions act as structure formers, whereas larger ones act as structure breakers. The latter exhibits the highest ion dc-conductivity. We quantify the effect of Coulomb interactions on the self-assembly, the glass temperature Tg (which was found to vary by 30 K), and the dc-conductivity (varying by 4 orders of magnitude). The precise synthesis of tailor-made ionic discotic liquid crystals with the HBC core and the characterization of their physical properties revealed that ion-conduction and nanoscale self-assembly in HBCs can be modulated by tuning electrostatic interactions, e.g., by adjusting the size of counterions. | ||
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| 700 | 1 | |a Tzourtzouklis, Ioannis |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Müllen, Klaus |e VerfasserIn |4 aut | |
| 700 | 1 | |a Floudas, George |e VerfasserIn |4 aut | |
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