Study on the Morphologies of Covalent Organic Microporous Polymers: the Role of Reaction Solvents

Two‐dimensional conjugated microporous polymers (CMPs) composed of alternative phenylene and ethynylene units are synthesized, by cross‐coupling polymerization of 1,3,5‐triethynylbenzene and 1,3,5‐tribromobenzene with various solvents. Our work shows that the morphology of CMPs is greatly affected by the choice of solvents used in synthesis. Sphere, tubular, and plate‐like structures are received by using the toluene, p‐xylene, and mesitylene solvents, respectively. Our results demonstrate that the morphology of CMPs affects the storage capacity for organic solvents remarkably, with the plate‐like CMP showing best performance. This work is expected to provide useful guidance to rationally design CMPs as absorbent materials for organic solvents. Two‐dimensional (2D) conjugated microporous polymers (CMPs) composed of alternative phenylene and ethynylene units are synthesized, by cross‐coupling polymerization of 1,3,5‐triethynylbenzene and 1,3,5‐tribromobenzene. Spherical, tubular, and plate‐like structures are received during the polymerization by using the toluene, p‐xylene, and mesitylene solvents, respectively.