MS35-P10 Exploring the catalytic performances of a series of bimetallic MIL-100(Fe-Ni) MOFsThe development of multifunctional solid catalysts is currently of foremost relevance in the field of heterogeneous catalysis. The reason is that it is expected that bi/multi-functionalization achieve specific reactions in one single step thus noticeably reducing processing costs. In this context, Metal-Organic Frameworks (MOFs) can play a crucial role given their chemically modulable nature and their already proved suitable performance as solid heterogeneous catalysts for specific liquid phase chemical transformations. The synthesis of stable mixed-metal MOFs however, is not always obvious and requires a control of the metal stoichiometry based on cations with different oxidation states and therefore very distinct chemical reactivities.
In this work we present a series of mixed-metal FeIII/NiII MOFs of the MIL-100 type material containing different metal ratios. The resulting heterometallic MIL-100(FeNi) materials maintain thermal, chemical and structural stability with respect to the parent MIL-100(Fe) MOF as can be deduced from XRPD, N2 adsorption, FTIR and thermal analysis. The nature and the oxidation state of the accessible cations have been evaluated by in situ infrared spectroscopy analysis. The obtained mixed-metal MIL-100(FeNi) MOFs and the parent MIL-100(Fe) material have been evaluated as heterogeneous catalysts in a model acid-catalyzed reaction such is the Prins reaction. It is found that the catalytic activity improves more than one order of magnitude for a certain metal substitution, with a complete selectivity for the formation of Nopol. The proposed mechanism will be discussed.References:
Keywords: MOFs, heterogeneous catalysis