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Royal Society of Chemistry, Physical Chemistry Chemical Physics, 44(14), p. 15562

DOI: 10.1039/c2cp42137b

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Synthesis, characterization and sorption properties of NH₂-MIL-47

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This paper is available in a repository.

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Abstract

An amino functionalized vanadium-containing Metal Organic Framework, NH(2)-MIL-47, has been synthesized by a hydrothermal reaction in an autoclave. Alternatively, a synthesis route via microwave enhanced irradiation has been optimized to accelerate the synthesis. The NH(2)-MIL-47 exhibits the same topology as MIL-47, in which the V center is octahedrally coordinated. After an exchange procedure in DMF the V(+III) center is oxidized to V(+IV), which is confirmed by EPR and XPS measurements. The CO(2) and CH(4) adsorption properties have been evaluated and compared to MIL-47, showing that both MOFs have an almost similar adsorption capacity and affinity for CO(2). DFT-based molecular modeling calculations were performed to obtain more insight into the adsorption positions for CO(2) in NH(2)-MIL-47. Furthermore our calculated adsorption enthalpies agree well with the experimental values.