Electrochromic molecule taking 4,4-dipyridyl as central structure and preparation method of electrochromic molecule

Abstract

The invention discloses an electrochromic molecule taking 4,4-dipyridyl as a central structure and a preparation method of the electrochromic molecule, and belongs to the technical field of electrochromism. The electrochromic molecule is a low-molecular-weight compound obtained through a multi-step reaction, and the general formula expression of the compound is (C18H17O3Br)(C10H8N2)(C18H17O3Br). According to the invention, 4,4'-dipyridyl is taken as a core raw material, 4-hydroxy-4'-bromobiphenyl, 3-chloro-1-propanol and acrylic acid bonds suitable for thermal curing and UV curing are used for grafting, the stability, the response speed and the weather resistance of the electrochromism are substantially improved, and the application width of the electrochromic molecule using 4,4'-dipyridyl as the central molecule is increased, so that the value of the electrochromic molecule taking the 4,4'-dipyridyl as the central molecule in the field of optical materials is increased, the raw material cost is saved, and the synthesis process is optimized.

Description

technical field [0001] The invention relates to an electrochromic molecule with 4,4'-bipyridine as the central structure and a preparation method thereof, belonging to the technical field of electrochromism. Background technique [0002] Electrochromism (Electrochromism) refers to the optical properties of materials such as refractive index, reflectivity, absorptivity and emissivity by injecting or extracting charges (ions or electrons) under the action of alternating applied current or electric power plants within the visible wavelength range A stable reversible change is produced, which is manifested as a reversible change in optical properties (color and transparency, etc.) in appearance. Its essence is that the structure of the chemical material changes under the action of the electric field, which causes the change of the absorption spectrum of the material. According to people's visual characteristics, materials that usually change significantly in the visible light r...

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Problems solved by technology

[0006] At present, the synthesis of electrochromic materials at home and abroad is facing many defects and deficiencies, the most important of which are the shortcomings of the prepared electrochromic molecules such as poor stability and weather resistance, and it is these defects that restrict the development of electrochromic materials. mass production and commercialization

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