Geminal Coordinatively Unsaturated Sites on MOF-808 for the Selective Uptake of Phenolics from a Real Bio-Oil Mixture

ChemSusChem
Chunmei JiaDirk De Vos

Abstract

The capping formate anions of the metal-organic framework (MOF) zirconium benzene-1,3,5-tricarboxylate (MOF-808) were removed by a solvent exchange procedure, resulting in a formate-free MOF-808 sample containing "geminal" defects consisting of six coordinatively unsaturated sites (CUSs) on each of the Zr6 nodes. Adsorption experiments with this material showed that the uptake of 4-methylguaiacol from a bio-oil mixture was proportional to the number of defects and amounted to one mole adsorbed per mole of zirconium. The selective uptake behavior of MOF-808 towards phenolic compounds was further evident from competitive adsorption experiments between furfuryl alcohol and 4-methylguaiacol as well as from the excellent (20 wt % for phenolic compounds and <7 wt % for other compounds) uptake performance for real bio-oil mixtures containing a large concentration and diversity of molecules.

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Citations

Oct 2, 2020·Organic & Biomolecular Chemistry·Nuria Martín, Francisco G Cirujano
May 16, 2019·Chemical Communications : Chem Comm·Chunmei JiaDirk De Vos
Oct 8, 2020·Chemistry : a European Journal·Beatriz Villoria-Del-ÁlamoAvelino Corma
Jun 29, 2021·ACS Applied Materials & Interfaces·Sergio Rojas-BuzoAvelino Corma
Aug 4, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Isabel Abánades LázaroFrancisco G Cirujano
Nov 7, 2019·ACS Applied Materials & Interfaces·Raymond ThürIvo F J Vankelecom

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