A convenient synthesis and physicochemical properties of diselenopheno[3,2-b:2′,3′-d]thiophenes

A series of diselenopheno[3,2-b:2',3'-d]thiophenes were designed and synthesized from tetrabromothiophene in two steps. Tetrabromothiophene was converted into the corresponding 2,5-dialkynyl-3,4dibromothiophenes by selective Sonogashra reactions and subsequent acetylene-activated SNAr-anionic cyclization cascades by Na2Se afforded the corresponding diselenopheno[3,2-b:2',3'-d]thiophenes (3a-d). The absorption and emission spectra of these compounds were investigated for optical properties. Electrochemical studies of 3a-d were carried out for their redox behaviors. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

A series of novel diselenopheno[3,2-b:2',3'-d]thiophenes were designed and synthesized, and their optical properties and electrochemical behaviors were investigated in this study.