BF3 center dot Et2O-mediated Friedel-Crafts C-H bond polymerization to synthesize pi-conjugation-interrupted polymer semiconductors

C-H bond functionalization offers a chance to develop a new concept of polymerization. In this article, a family of diarylfluorene-based p-conjugation-interrupted polymers (CIPs) with nonlinear or hyperbranched frameworks have been explored by BF3 center dot Et2O-mediated Friedel-Crafts polymerization of AB, AB(2) and AB(4)-type tertiary alcohol monomers at room temperature. Their chemical structures and optoelectronic properties have been characterized and the existence of strong intermolecular pi-stacked aggregates have been observed. CIP semiconductors afford a new platform to explore novel functionality of organic devices in organic electronics or spinelectronics.