Perovskite type complex with spin crossover property as well as preparation method and application thereof

Abstract

The invention discloses a perovskite type complex with a spin crossover property as well as a preparation method and application thereof. The complex is in an octahedral coordination mode, an inner cavity is filled with cations A, and the periphery of the complex is formed by coordination bridging of metal B and a ligand X; wherein the cation A is an organic cation; wherein the metal B is iron, and the ligand X is Au(CN)2- or Ag(CN)2-. The perovskite type complex shows the spin crossover property for the first time, is relatively sensitive to external stimulation, has potential application values of information storage, molecular switches, chemical sensors and the like, and provides a new direction for research of spin crossover materials; meanwhile, the complex also has a perovskite typestructure and has potential dielectric abnormality or ferroelectric properties, so that the complex can be prepared into a multifunctional material with optical, electrical and magnetic coupling. In addition, the structure of the complex is more stable, and the preparation method of the complex is simple and convenient for large-scale industrial production and preparation.

Description

technical field [0001] The present invention relates to the technical field of spin crossing materials, more specifically, to a perovskite complex with spin crossing property, its preparation method and application. Background technique [0002] The spin cross complex is a typical bistable molecular magnet. Because its active metal ions are generally ferrous ions, iron ions, cobalt ions, etc. have 3d 4 ~3d 7 Transition metal ions with electronic configuration, so there may be two different electronic configuration states of high spin and low spin. When the ligands with appropriate field strength are selected to form the corresponding complexes, the pairing energy is close to the splitting energy, and the electronic arrangement can be changed under external perturbation, resulting in the conversion of high and low spin states. It is accompanied by a series of changes in physical properties such as magnetism, conductivity, and color. In recent years, a series of spin-crosso...

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Problems solved by technology

However, Hoffman-type spin-crossing complexes need to use two or more bridging ligands, which may not necessarily obtain the target product during synthesis, and Hoffman-type spin-crossing complexes contain a large number of holes, which are easy to contain Solvent, which leads to the instability of the whole structure, making it difficult to test and apply

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