Towards acid MOFs – catalytic performance of sulfonic acid functionalized architectures
By J. Juan-Alcañiz, Robin Gielisse, A. Lago, E. Ramos‐Fernández, Pablo Serra-Crespo, T. Devic, N. Guillou, C. Serre, F. Kapteijn, Jorge Gascón. 2013
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In this work, the inclusion of free sulfonic acid groups in highly stable MOFs is explored. The synthesized catalysts have been applied in a model esterification reaction. Two metal organic frameworks bearing sulfonic acid moieties are investigated: HSO3-MIL-101(Cr) synthesized following different approaches and a new structure based on HSO3-bdc and Zr. The acidic properties, catalytic performance, deactivation and stability of the different structures are critically evaluated. In the case of MIL-101(Cr), deactivation of the sulfonic groups via formation of butanol sulfonic esters has been observed. Due to the strong interaction between –SO3 _ and the Cr open metal site where usually fluorine (F_) is located in the structure, the HSO3-MIL-101(Cr) catalysts are not stable under acidic regeneration conditions. When using Zr as a metal node, a new and stable sulfonic acid containing porous structure was synthesized. This structure showed high activity and full re-usability in the esterification of n-butanol with acetic acid. In this case, deactivation of the catalyst due to sulfonic ester formation could be reversed by reactivation under acidic conditions.
Subfields: Inorganic Chemistry, Mechanical Engineering, Organic Chemistry
View Paper: https://www.semanticscholar.org/paper/4444e4e7a57ac7b97da1b3dd9b893711e536e562
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In Inorganic Chemistry
Citations in the corpus
- Polyoxometalates confined in the mesoporous cages of metal–organic framework MIL-100(Fe): Efficient heterogeneous catalysts for esterification and acetalization reactions (2015, methodology): “For comparison, Amberlyst-15, a commercials resin catalyst often used in acid-catalyzed reactions [80,81], was also used in the esterification of acetic acid and n-hexanol.”