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Elucidating Lewis acidity of metal sites in MFU-4l metal-organic frameworks: N2O and CO2 adsorption in MFU-4l, CuI-MFU-4l and Li-MFU-4l

DOI: 10.1016/j.micromeso.2015.03.014 DOI Help

Authors: Dmytro Denysenko (University of Augsburg) , Jelena Jelic (Technische Universität München) , Oxana Magdysyuk (Diamond Light Source) , Karsten Reuter (Technische Universität München) , Dirk Volkmer (University of Augsburg)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Microporous And Mesoporous Materials , VOL 216 , PAGES 146 - 150

State: Published (Approved)
Published: November 2015
Diamond Proposal Number(s): 4963

Abstract: The interaction strength of N2O and CO2 molecules with different Lewis-acidic sites within MFU-4l–type metal-organic frameworks was studied via gas sorption measurements and density-functional theory calculations. MFU-4l comprising Zn–Cl units shows only physisorption of both gases. Introduction of Li into the parent MFU-4l framework leads to a remarkable increase of binding strength of both N2O and CO2 showing considerable Lewis acidity of LiI centers. CuI-MFU-4l shows even stronger binding of N2O, as compared to Li-MFU-4l, whereas CO2 doesn't bind to CuI centers. Preferential binding of N2O to CuI centers was also confirmed by in situ synchrotron X-ray powder diffraction measurements. These results show that CuI-MFU-4l can be considered as a material for selective N2O adsorption.

Journal Keywords: Metal-organic frameworks; Nitrous oxide; Adsorption; Copper

Subject Areas: Materials, Chemistry

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Other Facilities: ID22 at ESRF

Added On: 12/01/2016 16:07

Discipline Tags:

Chemistry Materials Science Metal-Organic Frameworks Metallurgy Organometallic Chemistry

Technical Tags:

Diffraction X-ray Powder Diffraction