Thiophene and pyrazine derivatives and preparation method thereof

Abstract

The invention relates to thiophene and pyrazine derivatives and a preparation method thereof, belonging to the field of organic electroluminescent materials. The derivatives are prepared by forming a molecular luminous core by centrosymmetrically connecting thiophene and pyrazine with four benzene rings, connecting functional groups of different structures and different conjugated degrees with the periphery of the core so that the red fluorescent molecules have charge-transmitting capability and can be used as a main red luminous material in the field of organic electroluminescence. The synthesis method comprises the following steps of: using 2,5-dibromothiophene as a raw material; nitrifying, carrying out C-C coupling with bromobenzene boric acid; reducing nitro groups; synthesizing a thiophene and pyrazine core with four peripheral bromines periphery together with 4,4'-dibromo benzyl; and then, carrying out C-N, C-C coupling reactions with arylamine, and the like or introducing acetylene groups to the periphery of the core and carrying out Diels-Alder cycloaddition with cyclopentadiene ketene with functional substituted groups to prepare target derivatives. The derivatives have strong absorption capability in an ultraviolet-visible light region, the dilute solution thereof emits strong fluorescence, and luminous peaks are between 600nm and 650nm.

Description

technical field

[0001] The invention relates to a class of thienopyrazine derivatives and a preparation method thereof, belonging to the field of organic electroluminescent materials. Background technique

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