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Issue 32, 2010
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A pulse chromatographic study of the adsorption properties of the amino-MIL-53 (Al) metal–organic framework

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Abstract

Low-coverage adsorption properties of the metal–organic framework amino-MIL-53 (Al) were determined using the pulse chromatographic technique. By using n-alkanes, iso-alkanes, 1-alkenes, cyclohexane and benzene as probe molecules, the nature of the adsorptive interactions in amino-MIL-53 (Al) was studied. Henry adsorption constants and adsorption enthalpies of iso-alkanes are significantly lower than those of the linear alkanes, demonstrating the shape selective properties of amino-MIL-53. The presence of amino-groups in the pores of the material increases the electrostatic contributions with molecules containing double bonds. A simple model relates adsorption enthalpies to the number of hydrogen atoms and double bonds in the molecule. The effective pore size of the material was estimated based on the relationship between adsorption enthalpy and entropy.

Graphical abstract: A pulse chromatographic study of the adsorption properties of the amino-MIL-53 (Al) metal–organic framework

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Supplementary files

Article information


Submitted
23 Dec 2009
Accepted
13 Apr 2010
First published
09 Jun 2010

Phys. Chem. Chem. Phys., 2010,12, 9413-9418
Article type
Paper

A pulse chromatographic study of the adsorption properties of the amino-MIL-53 (Al) metal–organic framework

S. Couck, T. Rémy, G. V. Baron, J. Gascon, F. Kapteijn and J. F. M. Denayer, Phys. Chem. Chem. Phys., 2010, 12, 9413
DOI: 10.1039/B927115E

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