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Updated: May 21, 2025

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Precise Design of Organic-Inorganic Hybrid Indium Molecular Ferroelectrics Based on Halogen Substitution
Yiyi Zeng1, Xiao Sun1, Zhao Yang1
1College of Chemistry and Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, P.R. China.
Abstract:
Low-dimensional hybrid organic-inorganic ferroelectric materials have attracted significant interest due to their outstanding optical and electrical properties. Nevertheless, many of the most extensively studied organic-inorganic hybrids incorporate lead or tin, which raises concerns related to long-term stability and environmental sustainability. Here, by using the quasi-spherical strategy, we have designed and obtained a series of zero-dimensional organic-inorganic hybrid indium metal ferroelectric compounds: [Me2CH2X(i-Pr)N][InBr4] (X = H, 1; F, 2; Cl, 3; Br, 4, respectively), based on halogen-substituted quaternary amines. The differential scanning calorimetry (DSC), dielectric, and second harmonic generation (SHG) measurement results show that these four compounds have high-temperature phase transitions (above room temperature). The ferroelectric properties of the compounds were confirmed through piezoresponse force microscopy (PFM) and electric hysteresis loop (P-E) measurements. This research offers new ideas for the advancement of ferroelectric materials and the innovation of future smart materials and optoelectronic devices.
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