Single molecule organic functional material with thermochromic transition and magnetic variation as well as preparation and application thereof

Abstract

The invention discloses a single molecule organic functional material with reversible thermochromic transition and magnetic variation. The compounds have structure characteristics of two isomers of malachite green and twisted tetrabenzochichibabin hydrocarbon, and can realize electron transfer and stuctural isomerism in single molecules in a certain range along with temperature change so as to realize changes of colors and magnetisms of the compounds. The invention further provides a preparation method of the compounds. The single molecule organic functional material with reversible thermochromic transition and magnetic variation provided by the invention has excellent chemical and thermal stabilities, and further has excellent thermochromic transition properties, such as narrow color change interval, obvious color change and bright color. In addition, the organic functional material has excellent thermally induced magnetic variation property.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to monomolecular organic functional materials with thermochromic and magnetic changes. Background technique [0002] Thermochromic materials refer to a class of compounds or mixtures that can change color when heated or cooled, and are a new class of functional materials. According to the reversibility of color change, it can be divided into reversible thermochromic materials and irreversible thermochromic materials. Whether a compound has reversible thermochromic properties mainly depends on the molecular structure itself. Reversible thermochromic materials are currently emerging smart materials. In recent years, reversible thermochromic materials researched and developed mainly include liquid crystal reversible thermochromic materials and inorganic reversible thermochromic materials (such as transition metal complexes, chromates, vanadates, tungstates, etc.) And organic rever...

AI Technical Summary

Problems solved by technology

At present, since most of the developed organic reversible thermochromic materials are color-changing compounds prepared from chromogenic agents, chromogenic agents and solvent-based substances, the preparation process is complicated and the cost is high.

In addition, this compound will melt into a liquid state when it is above the discoloration temperature, resulting in the loss of effective components; and because the compound is often directly exposed to the external environment and is easily affected by solvents, acids and bases, etc., it is necessary to seek a Reversible thermochromic materials with good chemical stability, excellent thermal stability, simple preparation process, low cost, and excellent application performance are particularly urgent and needed.

Images