Based on network chemistry, diverse topological structures and synthetic building blocks provide multifaceted combinations for the construction of two‐dimensional covalent organic frameworks (2D COFs). Herein, we employ the hcb topology as a template, replacing the conventional C3 and C2 configurations with a combination of C6 and C2V structures, thereby reshaping the chain connection into a 1D ribbon connection. The crown‐amine structure (C2N) pores unique to the resulting COF‐N6 and COF‐N8, alongside the original uniform pores, achieve functional differentiation in adsorption and mass transfer. Based on an appropriate size of crown amine, COF‐N8 achieved a maximum adsorption capacity of 2577 mg/g and an adsorption equilibrium time within 20 min for AuCl4−. Furthermore, theoretical calculations demonstrate that the crown amine in COF‐N8 exhibits strong coordination capabilities toward Au3+, alongside reductive properties. This work employs node engineering to construct heteroporous 2D COFs incorporating crown‐amine structures, providing a generic strategy for differentiating pore functions.
Developing structurally defined metal–organic catalysts that integrate CO2 enrichment, substrate activation, and catalytic durability remains essential for sustainable carbon utilization. Herein, a fluorinated two-dimensional europium-organic framework of {[Eu2(HFDPY)2(DMF)4]·2DMF·2H2O}n (NUC-171, H4FDPY = 2,6-bis(2,...
Qian Li, Reza Abazari, Rui-Fang Deng et al.· Inorganic Chemistry· 0 citations
Covalent organic frameworks (COFs) and porous organic cages (POCs) represent complementary classes of porous materials, but their integration into hierarchical structures remains challenging. Herein, we report the synthesis of the first fully organic Cage@COF hybrid materials via a host-in-host strategy driven by elect...
Marcos Martínez-Fernández, Barbara Ryabuhina, Tim David et al.· Materials Horizons· 0 citations
A simple one-step route for designing three covalently bonded porous organosilica polymers via tandem condensation, bearing an adjustable triazine moiety and N–Si cooperative microenvironments, has been reported for the first time. In contrast to the traditional methods that rely on prefabricated supports or postsynt...
D. Chakraborty, Sumanta Mondal, Soumik Paul et al.· Chemistry of Materials· 0 citations
Vinylene-linked covalent organic frameworks (COFs) are robust crystalline porous materials with high thermal stability and extended π-conjugation, but their pore-wall functionalization remains challenging because many functional groups are incompatible with the basic conditions required for Knoevenagel polymerization....
Covalent organic frameworks (COFs) incorporating metalloporphyrin units have gained significant attention as electrocatalysts for CO2 reduction. However, conventional phenylporphyrin-based COFs are fundamentally limited by narrow pore sizes (<3 nm), which impose severe mass transfer resistance and impede catalytic turn...
Lei Shu, Dan-Dan Chen, Can-Hao Li et al.· Journal of Colloid and Inter...· 0 citations
Woven covalent organic frameworks (woven COFs) represent a rare class of mechanically interlaced crystalline polymers whose synthesis is largely limited by the availability of suitable linkage chemistry. Herein, we report the first example of a vinylene-linked woven covalent organic framework, constructed through a K...
Bidhan Kumbhakar, Sourav Ghosh, Uttam Pal et al.· Journal of the American Chem...· 0 citations
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