堆积
材料科学
氧化还原
原位
石墨烯
单体
氧化物
拓扑(电路)
分子间力
纳米技术
分子
复合材料
聚合物
冶金
有机化学
化学
组合数学
数学
作者
Qiaomu Wang,Kaifei Tang,Qiaobo Liao,Yang Xu,Haocheng Xu,Yandong Wang,Peng Wang,Zhen Meng,Kai Xi
标识
DOI:10.1002/adfm.202211356
摘要
Abstract Covalent organic frameworks (COFs) with various topologies are typically synthesized by selecting and designing connecting units with rich shapes. However, this process is time‐consuming and labour‐intensive. Besides, the tight stacking of COFs layers greatly restrict their structural advantages. It is crucial to effectively exploit the high porosity and active sites of COFs by topological design. Herein, for the first time, inducing in situ topological changes in sub‐chemometric COFs by adding graphene oxide (GO) without replacing the monomer, is proposed. Surprisingly, GO can slow down the intermolecular stacking and induce rearrangement of COFs nanosheets. The channels of D‐ [4+3] COFs are significantly altered while the stacking of periodically expanded framework is weakened. This not only maximizes the exposure of pore area and polar groups, but also shortens the channels and increases the redox activity, which enables high loading while enhancing host‐guest interactions. This topological transformation to exhibit the structural features of COFs for efficient application is an innovative molecular design strategy.
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