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

Journal Article · · ChemComm
DOI:https://doi.org/10.1039/d0cc05339b· OSTI ID:1774328
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. Finally, 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.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357; SC0012704
OSTI ID:
1774328
Alternate ID(s):
OSTI ID: 1657302
OSTI ID: 1688379
Journal Information:
ChemComm, Journal Name: ChemComm Journal Issue: 78 Vol. 56; ISSN 1359-7345
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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