Dynamic and transformable Cu12 cluster-based C-H···π-stacked porous supramolecular frameworks

作者：Chengkai Zhang, Zhi Wang, Wei‐Dan Si, Hongxu Chu, Lan Zhou, Tong Li, Xianqiang Huang, Zhiyong Gao, Mohammad Azam, Chen‐Ho Tung, Ping Cui, Di Sun · 发表于：Nature Communications · 年份：2023 · DOI：10.1038/s41467-023-42201-w · 被引用次数：47 · 研究领域：Metal-Organic Frameworks: Synthesis and Applications、Nanocluster Synthesis and Applications、Supramolecular Self-Assembly in Materials

Abstract The assembly of cluster-based π-stacked porous supramolecular frameworks presents daunting challenges, including the design of suitable cluster building units, control of the sufficient C-H···π interactions, trade-off between structural dynamics and stability as well as understanding the resulting collective properties. Herein, we report a cluster-based C-H···π interaction-stacked porous supramolecular framework, namely, Cu12a-π, consisting of Cu 12 nanocluster as a 6-connected node, which is further propagated to a dynamic porous supramolecular frameworks via dense intralayer C-H···π interactions, yielding permanent porosity. In addition, Cu12a-π can be transformed into cluster-based nonporous adaptive crystals (Cu12b-NACs) via ligand-exchange following a dissociation-reassembly mechanism. Moreover, Cu12a-π can efficiently remove 97.2% of iodine from saturated iodine aqueous solutions with a high uptake capacity of 2.96 g·g −1 . These prospective results positioned at cluster-based porous supramolecular framework and enlighten follow-up researchers to design and synthesize such materials with better performance.