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

Indre Urbanaviciute; Miguel Garcia-Iglesias; Andrey Gorbunov; E.W. Meijer; Martijn Kemerink

doi:10.1039/d3cp00982c

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

Indre Urbanaviciute, Miguel Garcia-Iglesias, Andrey Gorbunov, E.W. Meijer, Martijn Kemerink (Corresponding author)

Onderzoeksoutput: Bijdrage aan tijdschrift › Tijdschriftartikel › Academic › peer review

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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.

Originele taal-2	Engels
Pagina's (van-tot)	16930-16937
Aantal pagina's	8
Tijdschrift	Physical Chemistry Chemical Physics
Volume	25
Nummer van het tijdschrift	25
DOI's	https://doi.org/10.1039/d3cp00982c
Status	Gepubliceerd - 7 jul. 2023

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Publisher Copyright:
© 2023 The Royal Society of Chemistry

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We would like to thank Prof. Beatriz Noheda Pinuaga for the opportunity to use the piezoelectric response measurement equipment and Anja R. A. Palmans and Tim D. Cornelissen for stimulating discussions and commenting on the manuscript. We also acknowledge technical support and help from Jacob Baas and Yingfen Wei during the piezoelectric measurements. I. U. acknowledges funding by Vetenskapsrådet (project no. 2015-03813). M. G. I. thanks Santander Talent Attraction Research (STAR2) and financial support from Spanish MINECO (PID2021-125429NA-I00). M. K. thanks the Carl Zeiss Foundation for financial support.

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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.",

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AU - Meijer, E.W.

AU - Kemerink, Martijn

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

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