Shedding Light on the Nature of Photoinduced States Formed in a Hydrogen-Generating Supramolecular RuPt Photocatalyst by Ultrafast Spectroscopy

Annemarie Huijser, Qing Pan, David van Duinen, Mads G. Laursen, Arnal El Nahhas, Pavel Chabera, Leon Freitag, Leticia Gonzalez, Qingyu Kong, Xiaoyi Zhang, Kristoffer Haldrup, Wesley R. Browne, Grigory Smolentsev, Jens Uhlig*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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 (10 mu s time scale. However, the photosensitizing Ru moiety is fully restored on a much shorter similar to 300 ns time scale. This reaction scheme implies that we may withdraw two electrons from activated by a single photon.
Original languageEnglish
JournalJournal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory
Volume122
Issue number31
Pages (from-to)6396-6406
Number of pages11
ISSN1089-5639
DOIs
Publication statusPublished - 2018

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