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Watching the dynamics of electrons and atoms at work in solar energy conversion
Max Planck Inst Biophys Chem, IFG Struct Dynam Biochem Syst, D-37077 Gottingen, Germany.;Deutsch Elektronensynchrotron DESY, Struct Dynam Ultra Short Pulsed Xrays, FS SCS, D-22607 Hamburg, Germany..
Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA..
Lund Univ, Ctr Anal & Synth, Dept Chem, S-22100 Lund, Sweden..
Tianjin Polytech Univ, Sch Environm & Chem Engn, Tianjin 300387, Peoples R China..
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2015 (English)In: Faraday discussions (Online), ISSN 1359-6640, E-ISSN 1364-5498, Vol. 185, 51-68 p.Article in journal (Refereed) PublishedText
Abstract [en]

The photochemical reactions performed by transition metal complexes have been proposed as viable routes towards solar energy conversion and storage into other forms that can be conveniently used in our everyday applications. In order to develop efficient materials, it is necessary to identify, characterize and optimize the elementary steps of the entire process on the atomic scale. To this end, we have studied the photoinduced electronic and structural dynamics in two heterobimetallic ruthenium-cobalt dyads, which belong to the large family of donor-bridge-acceptor systems. Using a combination of ultrafast optical and X-ray absorption spectroscopies, we can clock the light-driven electron transfer processes with element and spin sensitivity. In addition, the changes in local structure around the two metal centers are monitored. These experiments show that the nature of the connecting bridge is decisive for controlling the forward and the backward electron transfer rates, a result supported by quantum chemistry calculations. More generally, this work illustrates how ultrafast optical and X-ray

Place, publisher, year, edition, pages
2015. Vol. 185, 51-68 p.
National Category
Chemical Sciences
URN: urn:nbn:se:uu:diva-274718DOI: 10.1039/c5fd00084jISI: 000366909400003OAI: oai:DiVA.org:uu-274718DiVA: diva2:899356
Swedish Research CouncilThe Crafoord FoundationEU, European Research CouncilKnut and Alice Wallenberg Foundation
Available from: 2016-02-01 Created: 2016-01-25 Last updated: 2016-02-01Bibliographically approved

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Ott, Sascha
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Department of Chemistry - ÅngströmMolecular Biomimetics
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