Photoinduced Charge Accumulation and Prolonged Multielectron Storage for the Separation of Light and Dark ReactionClick to copy article linkArticle link copied!
- Martin Schulz*Martin Schulz*[email protected]Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, GermanyDepartment Functional Interfaces, Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, 07745 Jena, GermanyMore by Martin Schulz
- Nina HagmeyerNina HagmeyerInstitute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, GermanyMore by Nina Hagmeyer
- Frerk WehmeyerFrerk WehmeyerInstitute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, GermanyMore by Frerk Wehmeyer
- Grace LoweGrace LoweInstitute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, GermanyMore by Grace Lowe
- Marco RosenkranzMarco RosenkranzLeibniz Institute for Solid State and Materials Research, Helmholtzstraße 20, 01069 Dresden, GermanyMore by Marco Rosenkranz
- Bianca SeidlerBianca SeidlerInstitute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, GermanyMore by Bianca Seidler
- Alexey PopovAlexey PopovLeibniz Institute for Solid State and Materials Research, Helmholtzstraße 20, 01069 Dresden, GermanyMore by Alexey Popov
- Carsten StrebCarsten StrebInstitute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, GermanyMore by Carsten Streb
- Johannes G. VosJohannes G. VosSRC for Solar Energy Conversion, School of Chemical Sciences, Dublin City University, Dublin, IrelandMore by Johannes G. Vos
- Benjamin DietzekBenjamin DietzekInstitute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, GermanyDepartment Functional Interfaces, Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, 07745 Jena, GermanyCentre for Energy and Environmental Chemistry (CEEC), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, GermanyMore by Benjamin Dietzek
Abstract

The utilization of solar energy is restricted by the intermittent nature of solar influx. We present novel noble-metal free complexes that can be photochemically charged in the presence of sacrificial electron donors and remain stable in its charged form for over 14 h. This allows the doubly reduced Cu(I) 4H-imidazolate complex to be stored after photochemical charging and used as a reagent in dark reactions, such as the reduction of methyl viologen or oxygen. Combined UV–vis/EPR spectroelectrochemistry indicates that a two-electron reduction is induced by introducing sacrificial electron donors that facilitate proton-coupled electron transfer. Repeated photochemical reduction and chemical oxidation reveals that the complex retained a charging capacity of 72% after four cycles. We demonstrate a chemical system that can decouple photochemical processes from the day–night cycle, which has been a barrier to realizing utilization of solar energy in photochemical processes on a global scale.
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