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Photoexcited radical anion super-reductants for solar fuels catalysis
Stockholm University, Faculty of Science, Department of Physics.
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Number of Authors: 62018 (English)In: Coordination chemistry reviews, ISSN 0010-8545, E-ISSN 1873-3840, Vol. 361, p. 98-119Article, review/survey (Refereed) Published
Abstract [en]

The catalytic transformation of carbon dioxide into fuels is one of the most important reactions for creating a sustainable, carbon-neutral energy economy. Given that the sun is the only plausible energy source that can accommodate the increased global energy demand without contributing to catastrophic climate change, it makes sense to use solar energy to drive this reaction, ideally using the largest possible portion of the solar spectrum. Over the past several years, we have explored the use of reduced rylenediimide chromophores, which absorb wavelengths ranging into the near-infrared, as strongly reducing photosensitizers capable of photosensitizing Re(diimine)(CO)(3)L metal centers towards the binding and reduction of CO2. We have explored the effects of varying the binding geometry, donor-acceptor redox potentials, and excitation wavelength on the kinetics of electron transfer from the reduced rylenediimide to the metal center. So far, we have achieved charge-separated lifetimes in electrocatalytically active complexes of 25 ns when illuminated with near-infrared light, and >250 ns when illuminated with blue light.

Place, publisher, year, edition, pages
2018. Vol. 361, p. 98-119
Keywords [en]
Photoinduced electron transfer, Solar fuels, Ultrafast spectroscopy, Transient absorption, Artificial photosynthesis, Radical anions, CO2 reduction
National Category
Chemical Sciences Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-155900DOI: 10.1016/j.ccr.2018.01.018ISI: 000429761100003OAI: oai:DiVA.org:su-155900DiVA, id: diva2:1202780
Available from: 2018-04-30 Created: 2018-04-30 Last updated: 2018-04-30Bibliographically approved

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