Infrared study of the influence of reducible iron(III) metal sites on the adsorption of CO, CO2, propane, propene and propyne in the mesoporous metal-organic framework MIL-100

被引:207
作者
Leclerc, Herve [1 ]
Vimont, Alexandre [1 ]
Lavalley, Jean-Claude [1 ]
Daturi, Marco [1 ]
Wiersum, Andrew D. [2 ,3 ,4 ]
Llwellyn, Philip L. [2 ,3 ,4 ]
Horcajada, Patricia [5 ]
Ferey, Gerard [5 ]
Serre, Christian [5 ]
机构
[1] Univ Caen Basse Normandie, Catalyse & Spectrochim Lab, ENSICAEN, CNRS, F-14050 Caen, France
[2] Univ Aix Marseille 1, Lab Chim Provence, CNRS, UMR 6264,Ctr St Jerome, F-13397 Marseille 20, France
[3] Univ Aix Marseille 2, Lab Chim Provence, CNRS, UMR 6264,Ctr St Jerome, F-13397 Marseille 20, France
[4] Univ Aix Marseille 3, Lab Chim Provence, CNRS, UMR 6264,Ctr St Jerome, F-13397 Marseille 20, France
[5] Univ Versailles St Quentin Yvelines, Inst Lavoisier, CNRS, UMR 8180, F-78035 Versailles, France
关键词
CHROMIUM(III) CARBOXYLATE; BORON-TRIFLUORIDE; HYDROGEN STORAGE; ZEOLITES; IR; COMPLEXES; MOLECULES; PYRIDINE; SPECTRA; OXIDE;
D O I
10.1039/c1cp20502a
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The present study illustrates the importance of the oxidation state of iron within the mesoporous iron trimesate [{Fe3O(H2O)(2)F-0.81(OH)(0.19)}{C6H3(CO2)(3)}(2)] denoted MIL-100(Fe) (MIL = Material from Institut Lavoisier) during adsorption of molecules that can interact with the accessible metal sites through p-back donation. Adsorption of CO has been first followed by FTIR spectroscopy to quantify the Lewis acid sites in the dehydrated Fe(III) sample, outgassed at 150 degrees C, and on the partially reduced Fe(II/III), outgassed at 250 degrees C. The exposure of MIL-100(Fe) to CO2, propane, propene and propyne has then been studied by FTIR spectroscopy and microcalorimetry. It appears that p-back donating molecules are strongly adsorbed on reduced iron(II) sites despite the weaker Lewis acidity of cus Fe2+ sites compared to that of Fe3+ ones, as shown by pyridine adsorption.
引用
收藏
页码:11748 / 11756
页数:9
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