Preparation method of covalent organic framework material formed by alternately connecting two types of octopolar conjugated structural units through carbon-carbon double bonds

Abstract

The invention discloses a preparation method of a covalent organic framework material formed by alternately connecting two types of octopolar conjugated structure units through carbon-carbon double bonds, and relates to the field of organic framework materials. The preparation method comprises the following steps: step 1, preparing 1, 3, 5-tricyano-2, 4, 6-trimethylbenzene; step 2, preparing 2, 4,6-tri (p-aldehyde biphenyl)-1, 3, 5-triazine; step 3, adding the 1, 3, 5-tricyano-2, 4, 6-trimethylbenzene, the 2, 4, 6-tri (p-aldehyde biphenyl)-1, 3, 5-triazine, anhydrous piperidine and anhydrousN, N-dimethylformamide into a pressure-resistant bottle; step 4, heating and reacting under the protection of argon; and 5, after the reaction is finished, carrying out vacuum filtration to obtain a crude product. The method is simple and easy to implement, and required conventional equipment is easy to control; a solvothermal method is used for one-step synthesis of the covalent organic frameworkmaterial with a high crystalline state, a regular pore channel structure and two types of octupole conjugated structures which are periodically and alternately connected.

Description

technical field [0001] The invention relates to the field of organic framework materials, in particular to a method for preparing a covalent organic framework material composed of two types of octapolar conjugated structural units connected alternately through carbon-carbon double bonds. Background technique [0002] The polarity of organic semiconductor molecules fundamentally affects the spin-orbit interaction of molecules, the generation and separation of photoinduced charges, and the ability to absorb light. By adjusting the polarity, the thermally induced delayed fluorescence effect of organic molecules can be improved, and the absorption cross section can be expanded, or This strategy is widely used in organic light-emitting diodes, two-photon absorption, and photocatalysis. Normally, an organic molecule with a strong dipole moment is composed of an electron acceptor and an electron donor connected by a conjugated backbone, however, this asymmetric donor-acceptor struc...

AI Technical Summary

Problems solved by technology

At present, there are no related reports on octopole structure COFs materials, but integrating the intrinsic advantages of both vinyl bridging COFs and octopole structures to construct octopole conjugated structure COFs, while enriching the topological structure of such materials, Obtain excellent electronic structure and further develop the application potential of COF materials in photoelectric conversion and energy storage

Images