Flexible ferroelectric organic crystals

Magdalena Owczarek, Karl A. Hujsak, Daniel P. Ferris, Aleksandrs Prokofjevs, Irena Majerz, Przemysław Szklarz, Huacheng Zhang, Amy A. Sarjeant, Charlotte L. Stern, Ryszard Jakubas, Seungbum Hong (), Vinayak P. Dravid () and J. Fraser Stoddart ()
Additional contact information
Magdalena Owczarek: Northwestern University
Karl A. Hujsak: Northwestern University
Daniel P. Ferris: Northwestern University
Aleksandrs Prokofjevs: Northwestern University
Irena Majerz: Faculty of Pharmacy, Wroclaw Medical University
Przemysław Szklarz: Faculty of Chemistry, University of Wroclaw
Huacheng Zhang: Northwestern University
Amy A. Sarjeant: Northwestern University
Charlotte L. Stern: Northwestern University
Ryszard Jakubas: Faculty of Chemistry, University of Wroclaw
Seungbum Hong: Argonne National Laboratory
Vinayak P. Dravid: Northwestern University
J. Fraser Stoddart: Northwestern University

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract Flexible organic materials possessing useful electrical properties, such as ferroelectricity, are of crucial importance in the engineering of electronic devices. Up until now, however, only ferroelectric polymers have intrinsically met this flexibility requirement, leaving small-molecule organic ferroelectrics with room for improvement. Since both flexibility and ferroelectricity are rare properties on their own, combining them in one crystalline organic material is challenging. Herein, we report that trisubstituted haloimidazoles not only display ferroelectricity and piezoelectricity—the properties that originate from their non-centrosymmetric crystal lattice—but also lend their crystalline mechanical properties to fine-tuning in a controllable manner by disrupting the weak halogen bonds between the molecules. This element of control makes it possible to deliver another unique and highly desirable property, namely crystal flexibility. Moreover, the electrical properties are maintained in the flexible crystals.

Date: 2016
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DOI: 10.1038/ncomms13108

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