Synthesis and Electronic Properties of Oxidized Benzo[1,2‑b:4,5‑b′]dithiophenes

Benzo­[1,2-b:4,5-b′]­dithiophenes were oxidized under mild conditions with m-CPBA to yield the corresponding bis-sulfones (or tetraoxides). These sulfones possess red-shifted absorption and emission spectra relative to the parent molecules. Electrochemical analyses reveal that the benzodithiophene molecules are transformed from electron donors to electron acceptors.

苯并[1,2-b:4,5-b′]二噻吩（Benzo[1,2-b:4,5-b′]dithiophenes）在温和条件下经间氯过氧苯甲酸（m-CPBA）氧化，得到对应的双砜（或四氧化物）。相较于母体分子，该类砜化合物的吸收与发射光谱均发生红移。电化学分析结果表明，此类苯并二噻吩分子从电子给体转变为电子受体。