Synthesis, characterization and sorption properties of NH2-MIL-47.
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.
Department of Inorganic and Physical Chemistry, Center for Ordered Materials, Organometallics and Catalysis, Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium.
Karen
K
Leus
Sarah
S
Couck
Matthias
M
Vandichel
Gauthier
G
Vanhaelewyn
Ying-Ya
YY
Liu
Guy B
GB
Marin
Isabel
I
Van Driessche
Diederik
D
Depla
Michel
M
Waroquier
Veronique
V
Van Speybroeck
Joeri F M
JF
Denayer
Pascal
P
Van der Voort