writer：Hongbin Huo , Xuedong Xiao , Lu Chang, Xuanchen Xiong, Menghan Shi, Jingxia Wang & Wei Tian*
keywords：supramolecular polymers, heteropore, two-dimensional, iodine capture, cation-π interaction
source：期刊
specific source：Sci China Chem, 2023, 66 2070–2082
Issue time：2023年

      Constructing two-dimensional (2D) supramolecular polymers with complicated hierarchical porosity significantly contributes to developing effective strategies to control delicate self-assembly architectures, thus facilitating the fabrication of advanced 2D organic functional materials. Here, we report utilizing cooperative cation-π and electrostatic interactions to construct a series of robust 2D heteropore supramolecular polymers (2D HPSPs) with hierarchical pore structures, in which hexagonal and rec-tangular pores are alternately and periodically arranged, and the pore sizes can be finely tuned. Remarkably, the as-prepared 2D HPSPs exhibit excellent iodine (I2) capture rate (a maximum K80% value is 2.25 g h^-1), and present a novel mechanism involving transport-adsorption spatiotemporal separation for rapid I2 capture. In this mechanism, the transport offree I2 is first conducted in large hexagonal pores, and then I2 can be preferentially adsorbed in small rectangular pores, thereby preventing the transfer channels from blocking and greatly improving the adsorption kinetics.

https://doi.org/10.1007/s11426-023-1611-7