Abstract
Control over the spatial distribution of components in metal–organic
frameworks has potential to unlock improved performance and new
behaviour in separations, sensing and catalysis. We report an
unprecedented single-step synthesis of multi-component metal–organic
framework (MOF) nanoparticles based on the canonical ZIF-8 (Zn) system
and its Cd analogue, which form with a core–shell structure whose
internal interface can be systematically tuned. We use scanning
transmission electron microscopy, X-ray energy dispersive spectroscopy
and a new composition gradient model to fit high-resolution X-ray
diffraction data to show how core–shell composition and interface
characteristics are intricately controlled by synthesis temperature and
reaction composition. Particle formation is investigated by in situ
X-ray diffraction, which reveals that the spatial distribution of
components evolves with time and is determined by the interplay of phase
stability, crystallisation kinetics and diffusion. This work opens up
new possibilities for the control and characterisation of functionality,
component distribution and interfaces in MOF-based materials.
Original language | English |
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Number of pages | 9 |
Journal | Chemical Science |
Volume | Advance Article |
Early online date | 9 Feb 2021 |
DOIs | |
Publication status | E-pub ahead of print - 9 Feb 2021 |
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Single-step synthesis and interface tuning of core–shell metal–organic framework nanoparticles (dataset)
Orr, K. W. P. (Creator), Collins, S. M. (Creator), Reynolds, E. M. (Creator), Nightingale, F. (Creator), Boström, H. L. B. (Creator), Cassidy, S. J. (Creator), Dawson, D. M. (Creator), Ashbrook, S. E. (Creator), Magdysyuk, O. V. (Creator), Midgley, P. A. (Creator), Goodwin, A. L. (Creator) & Yeung, H.H.-M. (Creator), University of St Andrews, 2021
DOI: 10.17630/430ba0d9-56b2-4554-90b9-9e4a568aeb0f
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