Issue 78, 2020

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

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

Supplementary files

Article information

Article type
Communication
Submitted
05 8 2020
Accepted
25 8 2020
First published
26 8 2020

Chem. Commun., 2020,56, 11597-11600

Author version available

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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