A Temperatural Semi-Memorized Phase Transition in a 1D Organic–Inorganic Hybrid Material of Sb^|||-Based [(CH₂)₃NH₂S]₂SbCl₅

Abstract

The hybrid organic–inorganic materials have received extraordinary attention from the academic community not only because of their natural chemical tunability but also because of their potential in producing exotic physical properties. However, these characteristics are usually caused by the phase transition of materials under changing of external terms, and it is crucial to fully understand their origins. Here, we research an unusual phase transition near room temperature between two ordered phases in a one-dimensional (1D) hybrid organic–inorganic material of Sb ||| -based [(CH2)3NH2S]2SbCl5 (1). This phase transition is caused by collective actions, including the primary variation in the bonds of inorganic five-coordinated tetragonal pyramids, displacement and rotation of organic and inorganic components, along with concurrent hydrogen bonds transformation. Afterward, we observe a significant dielectric anomaly at low frequencies between low and high temperatures. This attributed to the fact that two phases coexist with the lessening temperature, which means that a small number of high-temperature features remained but did not occur during the heating process. These findings offer an avenue for inventing a fresh phase transition and dielectric switch hybrid materials, which further open up the prospect for their practical application.

Semi‐conductive, Switchable Dielectric and Photoluminescent Properties of Two High‐Temperature Phase Transition Hybrids

“…The ability to control/switch the response of various physical channels (such as thermal, electrical and optical channels) generally provides unique properties such as thermoelectric, photoelectric, and thermo-optical coupling, resulting the formation of new multifunctional materials. [1][2][3][4][5] Therefore, exploring new smart materials (such as piezoelectric, dielectric, thermoelectric and ferroelectric) has become a key concern recently. [6][7][8][9][10] Besides, this responsive material (switchable dielectric material) is expected to have potential applications in optical technology, signal processing, and data storage.…”

Compatible Ferroelectricity, Antiferroelectricity and Broadband Emission for a Multi-Functional 2D Organic-Inorganic Hybrid Perovskite

“…As shown in Figure 1, the heat flow curves display five pairs of abnormal endothermic and exothermic peaks during heating and cooling runs, respectively, indicating an occurrence of five phase transitions for BPA-PbBr4. The sharp phase transition peaks between heating and cooling process from high temperature to low temperature indicating that all the peaks exhibited first order phase transition feature except the second order phase transition indicated by the slow peak at 225.7 K. [22][23] We label the phase below 149.1 K as lowtemperature (LT) phase Ⅰ, the phases from 149.1 to 170.2 K and from 170.2 to 225.7 K and from 225.7 to 376.4 K and from 376.4 to 412.0 K as intermediate-temperature phasesⅡ~Ⅴ(IT1 ~ IT4), respectively, and the phase above 412.0 K as the high-temperature (HT) phase Ⅵ.…”

Phase Transition and Negative Thermal Expansion in Guanidinium Magnesium-Hypophosphite Hybrid Perovskite

“…It is well known that dielectric permittivity ε is sensitive to local structural rearrangements; therefore, it is a simple and effective parameter to investigate the phase transition and dynamic behaviors of structures. − The temperature-dependent dielectric responses of [Gua]­Mg­(H 2 POO) 3 were measured on powder-pressed pellets in the frequency range of 500 Hz–1 MHz. As shown in Figures and S7, the real parts (ε′) of dielectric constants reveal clear frequency-dependent responses.…”