Porous metal-metalloporphyrin gel as catalytic binding pocket for highly efficient synergistic catalysis

Weijie Zhang, James J. Dynes, Yongfeng Hu, Pingping Jiang () and Shengqian Ma ()
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Weijie Zhang: Jiangnan University
James J. Dynes: Canadian Light Source
Yongfeng Hu: Canadian Light Source
Pingping Jiang: Jiangnan University
Shengqian Ma: University of South Florida

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract Synergistic catalysis occurring in an enzyme pocket shows enhanced performance through supramolecular recognition and flexibility. This study presents an aerogel capable of similar function by fabricating a gel catalyst with hierarchical porosity. Here, the as-prepared Co-MMPG, a Co(II) metal-metalloporphyrin gel, maintains enough conformational flexibility and features a binding pocket formed from the co-facial arrangement of the porphyrin rings, as elucidated through the combined studies of solid-state NMR and X-ray absorption near-edge structure (XANES). The cooperativity between two Co(II) sites within the defined nanospace pocket facilitates the binding of different substrates with a favourable geometry thereby rendering Co-MMPG with excellent performance in the context of synergistic catalysis, especially for the kinetic control stereoselective reactions. Our work thus contributes a different enzyme-mimic design strategy to develop a highly efficient heterogeneous catalyst with high chemo/stereo selectivity.

Date: 2019
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DOI: 10.1038/s41467-019-09881-9

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