Photoinduced interfacial charge separation dynamics in zeolitic imidazolate framework

Physical Chemistry Chemical Physics : PCCP
Brian Pattengale, J Huang

Abstract

Owing to their porous structure and tunable framework, zeolitic imidazolate frameworks (ZIFs) have garnered considerable attention as promising photocatalytic materials. However, little is known regarding their photophysical properties. In this work, we report the photoinduced charge separation dynamics in a ZIF-67 thin film through interfacial electron transfer (ET) to methylene blue (MB+) via ultrafast transient absorption spectroscopy. We show that the ET process occurs through two distinct pathways, including an ultrafast (<200 fs) process from the [CoII(mim)2] units located on the surface of ZIF-67 film that are directly in contact with MB+ and a relatively slower ET process with a 101.4 ps time constant from the units in the bulk of the film that were isolated from MB+ by the surface units. This first direct evidence of the ET process from ZIF-67 to electron acceptor strongly suggests that ZIF materials may be used as intrinsic photocatalytic materials rather than inert hosts.

References

Jun 27, 2006·Proceedings of the National Academy of Sciences of the United States of America·Kyo Sung ParkOmar M Yaghi
Jul 13, 2006·The Journal of Physical Chemistry. a·Dominik HegerPetr Klán
Nov 3, 2009·Accounts of Chemical Research·Anh PhanOmar M Yaghi
May 19, 2010·Proceedings of the National Academy of Sciences of the United States of America·Jin Chong TanAnthony K Cheetham
Mar 17, 2015·Journal of the American Chemical Society·Kiwon EumSankar Nair
Oct 8, 2015·Chemical Reviews·James L WhiteAndrew B Bocarsly

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Citations

Feb 6, 2020·Physical Chemistry Chemical Physics : PCCP·Yixuan ZhouJier Huang
May 19, 2020·Physical Chemistry Chemical Physics : PCCP·Lucie DuplouyIsabelle Batonneau-Gener
Nov 10, 2020·Physical Chemistry Chemical Physics : PCCP·Wenhui HuJier Huang
Feb 18, 2021·Chemical Society Reviews·Gabrielle A LeithNatalia B Shustova
Feb 20, 2020·Journal of the American Chemical Society·Ekaterina A DolgopolovaNatalia B Shustova
Sep 5, 2018·Journal of the American Chemical Society·Brian PattengaleJier Huang

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