Catalytic properties of pristine and defect-engineered Zr-MOF-808 metal organic frameworks

Mautschke HH, Drache F, Senkovska I, Kaskel S, Llabres I Xamena FX (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Catalysis: Science and Technology Royal Society of Chemistry

Book Volume: 8

Pages Range: 3610-3616

Journal Issue: 14

DOI: 10.1039/c8cy00742j

Abstract

Various defect-engineered Zr-trimesate MOF-808 compounds (DE-MOF-808) have been prepared by mixing the tricarboxylate ligands with dicarboxylate ligands; viz. isophthalate, pyridine-3,5-dicarboxylate, 5-hydroxy-isophthalate, or 5-amino-isophthalate. The resulting mixed-ligand compounds, MOF-808-X (X = IP, Pydc, OH or NH2) were all found to be highly crystalline and isostructural to the unmodified MOF-808. Pristine MOF-808 showed better catalytic performance than a UiO-66 reference compound for the Meerwein-Ponndorf-Verley (MPV) reduction of carbonyl compounds. This was attributed to a higher availability of coordinatively unsaturated Zr⁴⁺ sites (cus) in MOF-808 upon removal of formate ions. Meanwhile, cus in UiO-66 are only located at defect sites and are thus much less abundant. Further improvement of the catalytic activity of defect-engineered MOF-808-IP and MOF-808-Pydc was observed, which may be related with the occurrence of less crowded Zr⁴⁺ sites in DE-MOF-808. The wider pore structure of MOF-808 with respect to UiO-66 compounds translates into a sharp improvement of the activity for the MPV reduction of bulky substrates, as shown for estrone reduction to estradiol. Interestingly, MOF-808 produces a notable diastereoselectivity towards the elusive 17-α-hydroxy estradiol.

Involved external institutions

Polytechnic University of Valencia / Universidad Politécnica de Valencia

Spain (ES) Technische Universität Dresden

Germany (DE)

How to cite

APA:

Mautschke, H.-H., Drache, F., Senkovska, I., Kaskel, S., & Llabres I Xamena, F.X. (2018). Catalytic properties of pristine and defect-engineered Zr-MOF-808 metal organic frameworks. Catalysis: Science and Technology, 8(14), 3610-3616. https://doi.org/10.1039/c8cy00742j

MLA:

Mautschke, H-H., et al. "Catalytic properties of pristine and defect-engineered Zr-MOF-808 metal organic frameworks." Catalysis: Science and Technology 8.14 (2018): 3610-3616.

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