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A new kind of piperazine-linked covalent organic framework (COF) was synthesized through the nucleophilic substitution reaction between octaminophthalocyanines and hexadecafluorophthalocyanines. The two-dimensional (2D) frameworks are in tetragonally shaped polygon sheets, which stack in an AA stacking mode to constitute periodically ordered metallophthalocyanine columns and one-dimensional (1D) microporous channels. The piperazine-linked COFs exhibit excellent chemical stability and permanent porosity. By virtue of the neatly arrayed phthalocyanine columns and inbuilt cationic radicals, the piperazine-linked frameworks are highly conductive. The conductivity values of NiPc-NH-CoPcF 8 COF reached up to 2.72 and 12.7 S m –1 for pellet and film samples, respectively. Moreover, this p -type conductive COF exhibited a high carrier mobility of 35.4 cm 2 V –1 s –1 . Both the electric conductivity and carrier mobility set new records for conductive COFs.
Yue et al. (Mon,) studied this question.