A perovskite complex with spin crossover properties, its preparation method and application

Abstract

The invention discloses a perovskite type complex with spin cross property, its preparation method and application. The complex is an octahedral coordination mode, wherein the inner cavity is filled with cation A, and the outer periphery is formed by coordination bridging between metal B and ligand X; wherein the cation A is an organic cation; the metal B is iron, and the Ligand X is Au(CN) 2 ‑ or Ag(CN) 2 ‑ . The perovskite-type complexes described in the present invention exhibit spin crossing properties for the first time, are sensitive to external stimuli, have potential application values ​​such as information storage, molecular switches, and chemical sensors, and provide a new direction for the research of spin crossing materials; At the same time, the complex has a perovskite structure and has potential dielectric anomalies or ferroelectric properties, so it can be prepared as a multifunctional material with optical, electrical and magnetic coupling. In addition, the structure of the complex is more stable, and its preparation method is simple, which is 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...

AI Technical Summary

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

Images