Plastic crystals, as a molecular material with multiple functions, have become a research hotspot in the exploration of new ferroelectric crystal compounds, especially due to their unique solid−solid phase transition properties. Based on this, we synthesized a new 0D organic−inorganic hybrid Fe-based plastic ferroelectric [(CH 3 ) 3 NCH 2 CHCH 2 ]FeCl 4 (1), which has a hightemperature phase transition point of 393 K, obvious ferroelectric domains, and spontaneous polarization and has been tested by dielectric and piezoelectric power microscopy (PFM) and ultraviolet absorption (UV−vis). At room temperature, it crystallizes in the space group Cmc2 1 and has an obvious SHG switch. In addition, compound 1 also has an optical narrow band gap of 2.45 eV, indicating that compound 1 is a high-quality semiconductor material. This work advances the development of plastic ferroelectrics and provides an avenue for exploring the frequency-doubling response and optoelectronic properties of high-temperature plastic ferroelectrics.

Chiral organic-inorganic hybrid perovskites have gained extensive research interest due to their combination of chirality and the excellent optical, electrical and spin properties of perovskite materials, especially in two-dimensional hybrid...

Since the switchable spontaneous polarization of ferroelectric materials endows it with many useful properties such as a large pyroelectric coefficient, switchable spontaneous polarization, and semiconductor, it has a wide range of application prospects, and the research of high-performance molecular ferroelectric materials has become a hot spot. We obtained a 0D organic–inorganic hybrid ferroelectric [(CH3)3NCH2CH2CH3]2FeCl4 (1) with well-defined ferroelectric domains and excellent domain inversion and exhibited a relatively large spontaneous polarization (Ps = 9 μC/m–2) and a Curie temperature (Tc ) of 394 K. Furthermore, compound 1 belongs to the non-centrosymmetrical space group Cmc21 and has a strong second-harmonic generation signal. Interestingly, we also performed magnetic tests on 1, which confirmed that it is a magnetic material. This work provides clues for exploring the application of high-performance molecular ferroelectric materials in future multifunctional smart devices.

Homochirality enables molecules to exhibit many specific physical properties, but single-component homochiral enantiomers with hightemperature reversible phase transitions and excellent dielectric switching properties are rarely reported. Here, we report a pair of single-component organic enantiomeric phase transition materials (R and S)-10,2-camphorsultams (1-R and 1-S). The two enantiomers display very similar physical and chemical properties, including structural phase transition temperatures up to 390 K, steplike dielectric anomalies from 2 to 8, and flexible dielectric switching properties. Homochiral (R and S)-10,2-camphorsultams (1-R and 1-S) crystallize at room temperature in polar point group 222, and the crystal structure and strong circular dichroism signal exhibit a clear mirror-image relationship. Furthermore, the intermolecular interactions of 1-R and 1-S are discussed in detail by Hirshfeld surface analysis. This work will promote the development of highperformance organic single-component reversible plastic phase transition materials.

One dimensional (1D) organic‐inorganic halide hybrid perovskites have the advantages of excellent organic cation modifiability and diversity of inorganic framework structures, which cannot be ignored in the development of multi‐functional phase‐transition materials in photoelectric and photovoltaic devices. Here, we have successfully modified and synthesized an organic‐inorganic hybrid perovskite photoelectric multifunctional phase‐transition material: [C7H13ONCH2F]⋅PbBr3 (1). The synergistic effect of the order double disorder transition of organic cations and the change of the degree of distortion of the inorganic framework leads to its high temperature reversible phase‐transition point of Tc=374 K/346 K and its ultra‐low loss high‐quality dielectric switch response. Through in‐depth research and calculation, compound 1 also has excellent semiconductor characteristics with a band gap of 3.06 eV and the photoluminescence characteristics of self‐trapped exciton (STE) broadband emission. Undoubtedly, this modification strategy provides a new choice for the research field of organic‐inorganic hybrid perovskite reversible phase‐transition photoelectric multifunctional materials with rich coupling properties.