Solvent-free powder synthesis and MOF-CVD thin films of the large-pore metal-organic framework MAF-6

DOI: 10.1021/acs.chemmater.9b03807

Authors: Timothee Stassin (KU Leuven) , Ivo Stassen (KU Leuven) , Joao Marreiros (KU Leuven) , Alexander John Cruz (KU Leuven) , Rhea Verbeke (KU Leuven) , Min Tu (KU Leuven) , Helge Reinsch (Christian-Albrechts-Universität zu Kiel) , Marcel Dickmann (Technische Universität München) , Werner Egger (Universität der Bundeswehr München) , Ivo F. J. Vankelecom (KU Leuven) , Dirk E. De Vos (KU Leuven) , Rob Ameloot (KU Leuven)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemistry Of Materials

State: Published (Approved)
Published: January 2020
Diamond Proposal Number(s): 17279

Abstract: A simple solvent- and catalyst-free method is presented for the synthesis of the large-pore metal-organic framework (MOF) MAF-6 (RHO-Zn(eIm)2) based on the reaction of ZnO with 2-ethylimidazole vapor at temperatures ≤ 100 °C. By translating this method to a chemical vapor deposition (CVD) protocol, crystalline films of a large-pore material could be deposited for the first time entirely from the vapor phase. A combination of PALS and Kr physisorption measurements confirmed the porosity of these MOF-CVD films and the size of the MAF-6 supercages (diam. ~2 nm), in close agreement with powder data and calculations. MAF-6 powders and films were further characterized by XRD, TGA, SEM, FTIR, PDF and EXAFS. The exceptional uptake capacity of MAF-6 in comparison to ZIF-8 is demonstrated by vapor-phase loading of a molecule larger than the ZIF-8 windows.

Journal Keywords: Granular materials; Thin films; Oxides; Metal organic frameworks; Chemical vapor deposition

Subject Areas: Materials, Chemistry, Physics


Instruments: I15-1-X-ray Pair Distribution Function (XPDF)

Other Facilities: Elettra Synchrotron Trieste: ESRF; Advanced Photon Source

Added On: 27/01/2020 11:51

Discipline Tags:

Surfaces Physics Chemistry Materials Science interfaces and thin films Metal-Organic Frameworks Metallurgy Organometallic Chemistry

Technical Tags:

Scattering Total Scattering