Synthesis of Cyclic Spirobifluorene Oligomers

摘要

Spirobifluorene and its derivatives have attracted attention because of their unique electronic and photoluminescent properties in recent years. Last year, we reported the synthesis of cyclic spirobifluorene trimer, where p-oligophenyl structure is bent in S-shape. Herein we report several other cyclic oligomers consisting of spirobifluorene.