Ambient Chemical Fixation of CO2 Using a Robust Ag27 Cluster-Based Two-Dimensional Metal-Organic Framework

Angewandte Chemie
Meihua ZhaoDi Sun

Abstract

Unprecedented double S2- templated Ag27 clusters have been stabilized by 5,10,15,20-tetra(4-pyridyl)porphyrin (TPyP-H2 ) ligands to afford a robust 2D metal-organic framework (Ag27-MOF). This silver cluster-assembled material serves as a highly efficient heterogeneous catalyst for the cyclization of both terminal and internal propargylamines with CO2 under atmospheric pressure. Density functional theory (DFT) calculations illustrate that the high catalytic activity and broad substrate scope are attributable to the saddle-shaped metallic node in Ag27-MOF, which features an accessible platform with high-density silver atoms as π-Lewis acid sites for activating C≡C triple bonds. As a result, different sterically hindered alkyne substrates can be effectively activated through π-interactions with these cationic silver centers.

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Citations

Oct 20, 2020·Chemistry : a European Journal·Yang-Lin ShenXing Lu
Jun 29, 2021·Journal of the American Chemical Society·Guocheng DengNanfeng Zheng
Jul 16, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Yang-Lin ShenXing Lu
Dec 5, 2020·Inorganic Chemistry·Francisco G CirujanoCarlos Martí-Gastaldo
Sep 21, 2021·Journal of the American Chemical Society·De-Jing LiJian Zhang

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