Zeng Yiyi, Sun Xiao, Yang Zhao, Wei Ying, Chen Guoyong, Guo Wenjing, You Xiuli, Wei Zhenhong, Cai Hu
College of Chemistry and Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, P.R. China.
Jiangxi Provincial Key Laboratory of Organic Functional Molecules; Institute of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330031, P.R. China.
Inorg Chem. 2025 Mar 31;64(12):6346-6355. doi: 10.1021/acs.inorgchem.5c00339. Epub 2025 Mar 17.
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: [MeCHX(-Pr)N][InBr] (X = H, ; F, ; Cl, ; Br, , 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.
