Polarity and Dielectric Property Control Triggered by a Coordinated Solvent Molecule Exchange in Luminescent Mononuclear Aluminium(III) Complexes

Author:

Kobayashi Fumiya1ORCID,Gemba Misato1,Hoshino Shoma1,Tsukiyama Koichi1,Shiotsuka Michito2,Nakajima Takashi3,Tadokoro Makoto1

Affiliation:

1. Department of Chemistry Faculty of Science Tokyo University of Science 1-3, Kagurazaka, Shinjuku-ku Tokyo 162-8601 Japan

2. Graduate School of Engineering Nagoya Institute of Technology Gokiso, Showa Nagoya Aichi 466-8555 Japan

3. Department of Applied Physics Faculty of Science Tokyo University of Science 6-3-1, Niijuku, Katsushika-ku Tokyo 125-8585 Japan

Abstract

AbstractThe development of molecule‐based multifunctional switchable materials that exhibit a switch of polarity and dielectric property are extremely limited. We have demonstrated solvent‐vapour‐induced reversible molecular rearrangements between nonpolar crystals [Al(sap)(acac)(sol)] (H2sap=2‐salicylideneaminophenol, acac=acetylacetonate, sol=MeOH (1), EtOH (2)) and polar crystal [Al(sap)(acac)(DMSO)] (3). This crystal‐to‐crystal structural transformation was accompanied by a switch of second harmonic generation (SHG) and dielectric properties, including the formation of ferroelectric domains, thus reflecting the SHG‐active polar Cc space group of 3. This is the first reported example of dielectric properties and polarity switching in luminescent mononuclear aluminium(III) complexes, which exhibit strong green emission in the solid state.

Funder

Japan Society for the Promotion of Science

Publisher

Wiley

Subject

General Chemistry,Catalysis,Organic Chemistry

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