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

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...

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Published in:ChemSusChem 2019-03, Vol.12 (6), p.1256-1266
Main Authors: Jia, Chunmei, Cirujano, Francisco G., Bueken, Bart, Claes, Birgit, Jonckheere, Dries, Van Geem, Kevin M., De Vos, Dirk
Format: Article
Language:English
Subjects:
Adsorption
Benzene
biorefinery
Defects
Furfuryl alcohol
geminal coordinatively unsaturated sites
liquid separation
Metal-organic frameworks
metal–organic framework
phenol
Phenols
Zirconium
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description 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
doi_str_mv 10.1002/cssc.201802692
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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 &lt;7 wt % for other compounds) uptake performance for real bio‐oil mixtures containing a large concentration and diversity of molecules. Selective uptake: The capping formate anions of the metal–organic framework (MOF) zirconium benzene‐1,3,5‐tricarboxylate (MOF‐808) are removed by solvent exchange, resulting in a formate‐free MOF‐808 sample containing “geminal” defects consisting of six coordinatively unsaturated sites on each of the Zr6 nodes. 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source Wiley-Blackwell Read & Publish Collection
subjects Adsorption
Benzene
biorefinery
Defects
Furfuryl alcohol
geminal coordinatively unsaturated sites
liquid separation
Metal-organic frameworks
metal–organic framework
phenol
Phenols
Zirconium
title Geminal Coordinatively Unsaturated Sites on MOF‐808 for the Selective Uptake of Phenolics from a Real Bio‐Oil Mixture
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