When 10:30 AM - 11:30 AM Sep 25, 2020
Where Virtual
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Formation and heterostructure control in metal–organic frameworks


Dr. Hamish Hei-Man Yeung
University of Birmingham, Lecturer, School of Chemistry

The Yeung group is interested in the formation and organisation of responsive materials, such as metal–organic frameworks (MOFs) and molecular conductors. We use a range of experimental methods, including in-situ X-ray diffraction, to probe how the structures of crystals grow, evolve and adapt in response to their environment. With such information, we can better understand their properties and develop design strategies for materials in future technology. 

This presentation will describe some of our recent work on MOFs, a class of porous materials constructed from metal-based nodes and organic linkers, which are of interest in gas sorption, chemical sensing, separations and catalysis. Using in-situ X-ray diffraction, we have uncovered evidence for a dynamic pre-nucleation equilibrium that precedes MOF crystallisation, which forms a new basis to explain and predict the effects of synthesis parameters on their formation [1]. This understanding also underpins the formation of certain mixed-component MOF nanoparticles, in which we find that components are partitioned as core–shell structures with tuneable interface characteristics that directly depend on the synthesis conditions [2].

Links

YeungGroupBham.com

@HamishY_Sci

References

[1] “Control of Metal–Organic Framework Crystallization by Metastable Intermediate Pre‐equilibrium Species” H. H.-M. Yeung, A. F. Sapnik, F. Massingberd-Mundy, M. W. Gaultois, Y. Wu, D. X. Fraser, S. Henke, R. Pallach, N. Heidenreich, O. Magdysyuk, N. T. Vo, A. L. Goodwin, Angewandte Chemie, International Edition 201958, 566-571. DOI: 10.1002/anie.201810039

[2] "Single-Step Synthesis and Interface Tuning of Core–shell Metal–organic Framework Nanoparticles" K. Orr, S. M. Collins, E. M. Reynolds, F. Nightingale, H. Boström, S. J. Cassidy, D. M. Dawson, S. Ashbrook, O. Magdysyuk, P. A. Midgley, A. L. Goodwin, H. H.-M. Yeung. ChemRxiv. Preprint. https://doi.org/10.26434/chemrxiv.12672113.v1