Jump to main content
Jump to site search

Issue 40, 2017
Previous Article Next Article

Anion-induced ferroelectric polarization in a luminescent metal–organic cage compound

Author affiliations

Abstract

Metal–organic crystalline solids with ferroelectric properties have attracted significant attention recently as materials for high-tech applications. Here, we describe two crystalline assemblies that contain cationic metal–organic cages {[Zn6(H2O)12][TPTA]8}(NO3)12·26H2O (1) and {[Zn6(H2O)12][TPTA]8}(ClO4)12·18.75H2O (2) featuring the tripodal ligand [PS(NH3Py)3] (TPTA). Ferroelectric measurement on a single crystal of 1 gave a remnant (Pr) polarization of 1.2 μC cm−2 at room temperature. The ferroelectric response originates from the toggling of nitrate anions and solvate molecules found in pockets between the cages. The temperature-dependent permittivity of 1 shows an anomalous dielectric peak at 20 °C. This is attributed to the desolvation-assisted dielectric relaxation behaviour and signifies the role of solvate molecules in the ferroelectric behaviour of 1. In addition, this material is highly luminescent exhibiting a bright blue emission under UV light. This multifunctional behaviour is unique among metal–organic cage frameworks.

Graphical abstract: Anion-induced ferroelectric polarization in a luminescent metal–organic cage compound

Back to tab navigation

Supplementary files

Publication details

The article was received on 27 Jul 2017, accepted on 27 Sep 2017 and first published on 29 Sep 2017


Article type: Paper
DOI: 10.1039/C7TC03375C
Citation: J. Mater. Chem. C, 2017,5, 10624-10629
  •   Request permissions

    Anion-induced ferroelectric polarization in a luminescent metal–organic cage compound

    A. Yadav, A. K. Srivastava, P. Kulkarni, P. Divya, A. Steiner, B. Praveenkumar and R. Boomishankar, J. Mater. Chem. C, 2017, 5, 10624
    DOI: 10.1039/C7TC03375C

Search articles by author

Spotlight

Advertisements