Fluorine-functionalized covalent organic framework material as well as preparation and thermoelectric application thereof

Abstract

The invention discloses preparation of a fluorine-functionalized covalent organic framework material and an application technology of the material in the thermoelectric field. Organic micromolecular elements are polymerized orderly through a Schiff-base condensation reaction with a solvent synthesis method to form a covalent bond connected crystal structure material. The covalent organic frameworkpolymer is synthesized for the first time, and the material has the advantages that the material has permanent open pore structure and very good thermal stability, tolerates iodine doping, shows ultrahigh seebeck coefficients and good thermoelectric performance at the room temperature for the first time and the like.

Description

Technical field

[0001] The invention belongs to the technical field of material chemistry, and specifically relates to a novel covalent organic framework material functionalized with fluorene, a preparation method thereof, and an application in the thermoelectric field. Background technique

[0002] Covalent organic frameworks (COFs) are a special porous crystalline material that can polymerize small organic molecules through framework chemical rules to obtain a pre-designed structural framework. This crystalline material is composed entirely of light elements and is composed of covalent bonds. It has low skeleton density, high specific surface area, uniform pore size distribution, and good chemical and thermal stability. Therefore, this crystalline COFs material is widely used in many fields such as gas storage and separation, heterogeneous catalysis, and optoelectronic devices.

[0003] Two-dimensional COFs materials generally tend to be arranged in a positively stacked structur...

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