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Shedding Light on t...
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Huijser, AnnemarieUniversity of Twente
(author)
Shedding Light on the Nature of Photoinduced States Formed in a Hydrogen-Generating Supramolecular RuPt Photocatalyst by Ultrafast Spectroscopy
- Article/chapterEnglish2018
Publisher, publication year, extent ...
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2018-07-27
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American Chemical Society (ACS),2018
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LIBRIS-ID:oai:lup.lub.lu.se:3db7c66b-a34f-466d-9996-a94e9eb2786f
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https://lup.lub.lu.se/record/3db7c66b-a34f-466d-9996-a94e9eb2786fURI
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https://doi.org/10.1021/acs.jpca.8b00916DOI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Photoinduced electronic and structural changes of a hydrogen-generating supramolecular RuPt photocatalyst are studied by a combination of time-resolved photoluminescence, optical transient absorption, and X-ray absorption spectroscopy. This work uses the element specificity of X-ray techniques to focus on the interplay between the photophysical and -chemical processes and the associated time scales at the catalytic Pt moiety. We observe very fast (<30 ps) photoreduction of the Pt catalytic site, followed by an ∼600 ps step into a strongly oxidized Pt center. The latter process is likely induced by oxidative addition of reactive iodine species. The oxidized Pt species is long-lived and fully recovers to the original ground state complex on a >10 μs time scale. However, the photosensitizing Ru moiety is fully restored on a much shorter ∼300 ns time scale. This reaction scheme implies that we may withdraw two electrons from a catalyst that is activated by a single photon.
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Pan, QingUniversity of Twente
(author)
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Van Duinen, DavidUniversity of Twente
(author)
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Laursen, Mads G.Technical University of Denmark
(author)
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El Nahhas, AmalLund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)chem-ael
(author)
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Chabera, PavelLund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)chem-pcr
(author)
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Freitag, LeonUniversity of Vienna
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González, LeticiaUniversity of Vienna
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Kong, QingyuArgonne National Laboratory
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Zhang, XiaoyiArgonne National Laboratory
(author)
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Haldrup, KristofferTechnical University of Denmark
(author)
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Browne, Wesley R.University of Groningen
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Smolentsev, GrigorySouthern Federal University,Paul Scherrer Institute(Swepub:lu)chem-gis
(author)
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Uhlig, JensLund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)chem-jnu
(author)
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University of TwenteTechnical University of Denmark
(creator_code:org_t)
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In:Journal of Physical Chemistry A: American Chemical Society (ACS)122:31, s. 6396-64061089-56391520-5215
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Huijser, Annemar ...
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Pan, Qing
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Van Duinen, Davi ...
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Laursen, Mads G.
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El Nahhas, Amal
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Chabera, Pavel
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Freitag, Leon
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González, Letici ...
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Kong, Qingyu
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Zhang, Xiaoyi
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Haldrup, Kristof ...
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Browne, Wesley R ...
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Smolentsev, Grig ...
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Uhlig, Jens
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