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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 12: Materials for Energy Storage (joint session KFM/CPP)

KFM 12.5: Vortrag

Donnerstag, 19. März 2020, 11:10–11:30, HSZ 301

Rapid, clean and scalable synthesis of microporous functional MOFs and their non-conventional forms via mechanochemistry — •Krunoslav Užarević — Ruder Boskovic Institute, 10000 Zagreb, Croatia

Here we present the application of mechanochemical reactions,[1] i.e. reactions between solid reactants induced by mechanical force, for a rapid, green and room-temperature transformation of environmentally safe metal precursors, oxides or hydroxides into most relevant microporous MOFs, such as HKUST-1, MOF-74[5] or zirconium-based MOFs of UiO[3] and NU- families, and also their multi-metal or amorphous derivatives not accessible from solution. We show here how the milling produces high-quality MOFs quantitatively in multigram quantities by using only a catalytic amount of *green liquids, such as methanol or water.

In situ synchrotron X-ray powder diffraction monitoring[8] revealed that the mechanochemical formation of MOFs often proceeds through intermediate phases, most of which are inaccessible from solution procedures. It is possible to isolate and characterize these intermediates, and also use them for the controllable synthesis of multi-metal MOFs, such as various bimetal MOF-74 materials, with interesting magnetic properties and strong potential for new catalytic reactivity.

[3] James et al, Chem. Soc. Rev. 2012, 42, 7638. [2] Julien et al, J. Am. Chem. Soc., 2016, 138, 2929. [3] Užarević et al., Chem. Commun. 2016, 52, 2133. [8] a) Užarević et al., J. Phys. Chem. Lett, 2015, 6, 4129.