Preparation method and application of organic conjugated micro-molecules rich in nitrogen and sulfur

The invention discloses organic conjugated micro-molecules rich in nitrogen and sulfur, and a preparation method and application thereof. The organic conjugated micro-molecules rich in nitrogen and sulfur have a structure shown by formula (I), wherein R is hydrogen, alkyl or aryl. The invention also provides a preparation method of the compound of formula (I). The synthetic route of the organic conjugated micro-molecules is simple and effective; raw materials are commercial cheap products, and the synthesis cost is low; and a synthetic method has universality, and can be popularized and applied to synthesis of other various substituent substituted tetrathiophene derivatives. OFETs (organic field-effect transistors) prepared by taking 5,11-dihydro-2,2'-([1,3]) dithiol [4,5-e] pyrazine [2,3-g][1,3] dithiol [4,5-b] quinoxaline-2,8-diidene) di-malononitrile compound (DTYM), synthesized by the method disclosed by the invention, as an organic semiconductor layer are relatively high in mobility and on/off ratio, the