Ferro- and ferrielectricity and negative piezoelectricity in thioamide-based supramolecular organic discotics

• Verfasst von: Urbanavičiūtė, Indrė [VerfasserIn]
• Verfasst von: Garcia-Iglesias, Miguel [VerfasserIn]
• Verfasst von: Gorbunov, Andrey [VerfasserIn]
• Verfasst von: Meijer, E. W. [VerfasserIn]
• Verfasst von: Kemerink, Martijn [VerfasserIn]
• Titel: Ferro- and ferrielectricity and negative piezoelectricity in thioamide-based supramolecular organic discotics
• Verf.angabe: Indre Urbanaviciute, Miguel Garcia-Iglesias, Andrey Gorbunov, E.W. Meijer and Martijn Kemerink
• Jahr: 2023
• Umfang: 8 S.
• Illustrationen: Illustrationen
• Fussnoten: Veröffentlicht: 13. Juni 2023 ; Gesehen am 09.08.2023
• Titel Quelle: Enthalten in: Physical chemistry, chemical physics
• Ort Quelle: Cambridge : RSC Publ., 1999
• Jahr Quelle: 2023
• Band/Heft Quelle: 25(2023), 25, Seite 16930-16937
• ISSN Quelle: 1463-9084
• DOI: doi:10.1039/D3CP00982C
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 185499557X

Abstract

Amide-based discotic supramolecular organic materials are of interest for fundamental understanding of cooperative self-assembly and collective dipole switching mechanisms as well as for practically relevant ferroelectric and piezoelectric properties. Here, we show how replacing amides (dipole moment of ∼3.5 D) with thioamides (∼5.1 D) as dipolar moieties in the archetypal C3-symmetric discotic molecule BTA leads to ferroelectric materials with a higher remnant polarization and lower coercive field. The thioamide-based materials also demonstrate a rare negative piezoelectricity and a previously predicted, yet never experimentally observed, polarization reversal via asymmetric intermediate states, that is, ferrielectric switching.