Hierarchical Frameworks of Metal–Organic Cages with Axial Ferroelectric Anisotropy

Yadav, A ORCID: 0000-0002-9414-2450, Kulkarni, P, Praveenkumar, B, Steiner, A ORCID: 0000-0002-4315-6123 and Boomishankar, R ORCID: 0000-0002-5933-4414 (2018) Hierarchical Frameworks of Metal–Organic Cages with Axial Ferroelectric Anisotropy Chemistry A European Journal, 24 (55). pp. 14639-14643. ISSN 0947-6539, 1521-3765

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Abstract

Designing molecular crystals with switchable dipoles for ferroelectric applications is challenging and often serendipitous. Herein, we show a systematic approach toward hierarchical 1D, 2D and 3D frameworks that are assembled through successive linkage of metal–organic cages [Cu<inf>6</inf>(H<inf>2</inf>O)<inf>12</inf>(TPTA)<inf>8</inf>]¹²⁺ with chloride ions. Their ferroelectric properties are due to the displacement of channel-bound nitrate counterions and solvated water molecules relative to the framework of cages. Ferroelectric measurements of crystals of discrete and 1D-framework assemblies showed axial ferroelectric anisotropy with high remnant polarisation. Both, the reversible formation of cage-connected networks and the observation of ferroelectric anisotropic behaviour are rare among metal–ligand cage assemblies.

Item Type:	Article
Uncontrolled Keywords:	anisotropy, cage compounds, dielectric permittivity, ferroelectricity, polar order
Depositing User:	Symplectic Admin
Date Deposited:	16 Aug 2018 09:02
Last Modified:	01 Mar 2026 09:25
DOI:	10.1002/chem.201803863
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3025093
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