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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 ...

  • 2018-07-27
  • American Chemical Society (ACS),2018

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:3db7c66b-a34f-466d-9996-a94e9eb2786f
  • https://lup.lub.lu.se/record/3db7c66b-a34f-466d-9996-a94e9eb2786fURI
  • https://doi.org/10.1021/acs.jpca.8b00916DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • 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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Added entries (persons, corporate bodies, meetings, titles ...)

  • Pan, QingUniversity of Twente (author)
  • Van Duinen, DavidUniversity of Twente (author)
  • Laursen, Mads G.Technical University of Denmark (author)
  • 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)
  • 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)
  • Freitag, LeonUniversity of Vienna (author)
  • González, LeticiaUniversity of Vienna (author)
  • Kong, QingyuArgonne National Laboratory (author)
  • Zhang, XiaoyiArgonne National Laboratory (author)
  • Haldrup, KristofferTechnical University of Denmark (author)
  • Browne, Wesley R.University of Groningen (author)
  • Smolentsev, GrigorySouthern Federal University,Paul Scherrer Institute(Swepub:lu)chem-gis (author)
  • 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)
  • University of TwenteTechnical University of Denmark (creator_code:org_t)

Related titles

  • In:Journal of Physical Chemistry A: American Chemical Society (ACS)122:31, s. 6396-64061089-56391520-5215

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