Transient intermediate in the formation of an amorphous metal-organic framework
SOFT MATTER(2024)
摘要
Amorphous metal-organic frameworks are rarely formed via direct synthesis. Our limited understanding of their atomic assembly in solution prevents full exploitation of their unique structural complexity. Here, we use in situ synchrotron X-ray absorption spectroscopy with sub-second time resolution to probe the formation of the amorphous Fe-BTC framework. Using a combination of spectral fingerprinting, linear combination analysis, and principal component analysis coupled with kinetic analyses, we reveal a multi-stage formation mechanism that, crucially, proceeds via the generation of a transient intermediate species. Amorphous metal-organic frameworks are rarely formed via direct synthesis. Here, in situ synchrotron X-ray absorption spectroscopy probes the formation of Fe-BTC, revealing a multi-stage mechanism that proceeds via a transient intermediate species.
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