Research Article


2021, 14(2): 381–386


Effects of connecting sequences of building blocks on reticular synthesis of covalent organic frameworks

De-Li Ma1,2, Cheng Qian1,2 (✉), Qiao-Yan Qi2, Zhong-Ri Zhong1, Guo-Fang Jiang1 (✉), and Xin Zhao2 (✉)

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1 State Key Lab of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
2 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, Shanghai 200032, China

Keywords: reticular chemistry, covalent organic framework, connecting sequence, building block
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  • Abstract
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The principle of reticular chemistry has been widely used to guide the design of crystalline porous materials such as metal organic frameworks (MOFs) and covalent organic frameworks (COFs). While in the early strategies only the symmetries of the building blocks were considered for reticular synthesis of COFs, recently a few researches on COFs with hierarchical porosities indicate that connecting sequence of building blocks also plays a crucial role in determining crystalline structures of COFs. However, this important phenomenon has not been systematically investigated yet. In this article, a model system has been established to demonstrate how different connecting sequences of two C2v-symmetric building blocks lead to the formation of four two-dimensional (2D) COFs with distinct framework structures. To verify this concept, target synthesis was conducted to produce three COFs, whose structures were confirmed by powder X-ray diffraction and pore size distribution analysis.
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Effects of connecting sequences of building blocks on reticular synthesis of covalent organic frameworks. Nano Res. 2021, 14(2): 381–386

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