A new azodioxy-linked porphyrin-based semiconductive covalent organic framework with I-2 doping-enhanced photoconductivity

A room-temperature solution phase reaction was developed to synthesize a covalent organic framework (COF) for the first time. The synthesized azodioxy-linked porphyrin-based COF (POR-COF) possesses a 2D chess board-like structure in the ab-plane and a 1D channel with an open-window size of around 1.9 nm along the c-axis in the modeled crystal structure. The electrical conductivity of POR-COF increases by more than 3 orders of magnitude through I-2 doping. The photoconductivity of the I-2-doped COF material was also studied firstly. POR-COF shows interesting doping-enhanced photo-current generation.