Ferroelectric Coordination Polymers Self-Assembled from Mesogenic Zinc(II) Porphyrin and Dipolar Bridging Ligands

Joseph K.H. Hui, Hiroyuki Kishida, Keita Ishiba, Kenta Takemasu, Masa aki Morikawa, Nobuo Kimizuka

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A new class of ferroelectric coordination-based polymers has been developed by the self-assembly of lipophilic zinc porphyrin (ZnP) and ditopic bridging ligands. The ligands contain dipolar benzothiadiazole or fluorobenzene units, which are axially coordinated to ZnP with the dipole moments oriented perpendicular to the coordination axes. The coordination-based polymers show ferroelectric characteristics in the liquid crystalline state, as revealed by distinctive hysteresis in the polarization–electric field (P–E) loops and inversion current peaks in current–voltage (I–V) loops. The observed ferroelectric properties are explainable by flip–flop rotation of the dipolar axle ligands induced by the applied electric field, as demonstrated by the positive-up–negative-down (PUND) measurements. The present system provides a new operating principle in supramolecular ferroelectrics.

Original languageEnglish
Pages (from-to)14213-14218
Number of pages6
JournalChemistry - A European Journal
Volume22
Issue number40
DOIs
Publication statusPublished - Sep 26 2016

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry

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