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Issue 78, 2020
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Heterometal incorporation in NH2-MIL-125(Ti) and its participation in the photoinduced charge-separated excited state

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Abstract

Optical and X-ray spectroscopy studies reveal the location and role of Fe3+ sites incorporated through direct synthesis in NH2-MIL-125(Ti). Fe K-edge XAS analysis confirms its metal–oxo cluster node coordination while time-resolved optical and X-ray transient absorption studies disclose its role as an electron trap site, promoting long-lived photo-induced charge separation in the framework. Notably, XTA measurements show sustained electron reduction of the Fe sites into the microsecond time range. Comparison with an Fe-doped MOF generated through post-synthetic modification indicates that only the direct synthesis approach affords efficient Fe participation in the charge separated excited state.

Graphical abstract: Heterometal incorporation in NH2-MIL-125(Ti) and its participation in the photoinduced charge-separated excited state

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Supplementary files

Article information


Submitted
05 Aug 2020
Accepted
25 Aug 2020
First published
26 Aug 2020

Chem. Commun., 2020,56, 11597-11600
Article type
Communication

Heterometal incorporation in NH2-MIL-125(Ti) and its participation in the photoinduced charge-separated excited state

L. Hanna, C. L. Long, X. Zhang and J. V. Lockard, Chem. Commun., 2020, 56, 11597
DOI: 10.1039/D0CC05339B

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