Jiang Shu-Yan, Zhou Zhi-Bei, Gan Shi-Xian, Lu Ya, Liu Chao, Qi Qiao-Yan, Yao Jin, Zhao Xin
Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, 200032, Shanghai, China.
University of Chinese Academy of Sciences, 100049, Beijing, China.
Nat Commun. 2024 Jan 24;15(1):698. doi: 10.1038/s41467-024-44890-3.
Creating different pore environments within a covalent organic framework (COF) will lead to useful multicompartment structure and multiple functions, which however has been scarcely achieved. Herein we report designed synthesis of three two-dimensional COFs with amphiphilic porosity by steric-hindrance-mediated precision hydrophilic-hydrophobic microphase separation. Dictated by the different steric effect of the substituents introduced to a monomer, dual-pore COFs with kgm net, in which all hydroxyls locate in trigonal micropores while hydrophobic sidechains exclusively distribute in hexagonal mesopores, have been constructed to form completely separated hydrophilic and hydrophobic nanochannels. The unique amphiphilic channels in the COFs enable the formation of Janus membranes via interface growth. This work has realized the creation of two types of channels with opposite properties in one COF, demonstrating the feasibility of introducing different properties/functions into different pores of heteropore COFs, which can be a useful strategy to develop multifunctional materials.
在共价有机框架（COF）内创建不同的孔隙环境将产生有用的多隔室结构和多种功能，然而这一点几乎尚未实现。在此，我们报告了通过空间位阻介导的精确亲水 - 疏水微相分离设计合成三种具有两亲性孔隙率的二维COF。受引入单体的取代基不同空间效应的支配，构建了具有kgm网络的双孔COF，其中所有羟基位于三角形微孔中，而疏水侧链仅分布在六边形介孔中，形成了完全分离的亲水和疏水纳米通道。COF中独特的两亲性通道通过界面生长实现了Janus膜的形成。这项工作实现了在一个COF中创建两种具有相反性质的通道，证明了将不同性质/功能引入异质孔COF不同孔隙的可行性，这可能是开发多功能材料的一种有用策略。
