Journalartikel

Autorenliste: Franz, E; Kunz, A; Oberhof, N; Heindl, AH; Bertram, M; Fusek, L; Taccardi, N; Wasserscheid, P; Dreuw, A; Wegner, HA; Brummel, O; Libuda, J

Jahr der Veröffentlichung: 2022

Seiten: e202200958-

Zeitschrift: Chemistry-Sustainability-Energy-Materials

Bandnummer: 2022

ISSN: 1864-5631

eISSN: 1864-564X

Open Access Status: Hybrid

DOI Link: https://doi.org/10.1002/cssc.202200958

Verlag: Wiley

Abstract: 
Molecular solar thermal (MOST) systems combine solar energy conversion, storage, and release in simple one-photon one-molecule processes. Here, we address the electrochemically triggered energy release from an azothiophene-based MOST system by photoelectrochemical infrared reflection absorption spectroscopy (PEC-IRRAS) and density functional theory (DFT). Specifically, the electrochemically triggered back-reaction from the energy rich (Z)-3-cyanophenylazothiophene to its energy lean (E)-isomer using highly oriented pyrolytic graphite (HOPG) as the working electrode was studied. Theory predicts that two reaction channels are accessible, an oxidative one (hole-catalyzed) and a reductive one (electron-catalyzed). Experimentally it was found that the photo-isomer decomposes during hole-catalyzed energy release. Electrochemically triggered back-conversion was possible, however, through the electron-catalyzed reaction channel. The reaction rate could be tuned by the electrode potential within two orders of magnitude. It was shown that the MOST system withstands 100 conversion cycles without detectable decomposition of the photoswitch. After 100 cycles, the photochemical conversion was still quantitative and the electrochemically triggered back-reaction reached 94 % of the original conversion level.

Harvard-Zitierstil: Franz, E., Kunz, A., Oberhof, N., Heindl, A., Bertram, M., Fusek, L., et al. (2022) Electrochemically Triggered Energy Release from an Azothiophene-Based Molecular Solar Thermal System, Chemistry-Sustainability-Energy-Materials, 2022, Article e202200958. p. e202200958. https://doi.org/10.1002/cssc.202200958

APA-Zitierstil: Franz, E., Kunz, A., Oberhof, N., Heindl, A., Bertram, M., Fusek, L., Taccardi, N., Wasserscheid, P., Dreuw, A., Wegner, H., Brummel, O., & Libuda, J. (2022). Electrochemically Triggered Energy Release from an Azothiophene-Based Molecular Solar Thermal System. Chemistry-Sustainability-Energy-Materials. 2022, Article e202200958, e202200958. https://doi.org/10.1002/cssc.202200958