Norbornadiene photoswitches anchored to well-defined oxide surfaces: From ultrahigh vacuum into the liquid and the electrochemical environment
Artikel i vetenskaplig tidskrift, 2020

Employing molecular photoswitches, we can combine solar energy conversion, storage, and release in an extremely simple single molecule system. In order to release the stored energy as electricity, the photoswitch has to interact with a semiconducting electrode surface. In this work, we explore a solar-energy-storing model system, consisting of a molecular photoswitch anchored to an atomically defined oxide surface in a liquid electrolyte and under potential control. Previously, this model system has been proven to be operational under ultrahigh vacuum (UHV) conditions. We used the tailor-made norbornadiene derivative 2-cyano-3-(4-carboxyphenyl)norbornadiene (CNBD) and characterized its photochemical and electrochemical properties in an organic electrolyte. Next, we assembled a monolayer of CNBD on a well-ordered Co3O4(111) surface by physical vapor deposition in UHV. This model interface was then transferred into the liquid electrolyte and investigated by photoelectrochemical infrared reflection absorption spectroscopy experiments. We demonstrate that the anchored monolayer of CNBD can be converted photochemically to its energy-rich counterpart 2-cyano-3-(4-carboxyphenyl)quadricyclane (CQC) under potential control. However, the reconversion potential of anchored CQC overlaps with the oxidation and decomposition potential of CNBD, which limits the electrochemically triggered reconversion.

Författare

Manon Bertram

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Fabian Waidhas

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Martyn Jevric

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Kasper Moth-Poulsen Group

Lukas Fromm

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Christian Schuschke

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Maximilian Kastenmeier

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Andreas Görling

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Kasper Moth-Poulsen

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Kasper Moth-Poulsen Group

Olaf Brummel

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Jörg Libuda

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Journal of Chemical Physics

0021-9606 (ISSN) 1089-7690 (eISSN)

Vol. 152 4 044708

Ämneskategorier

Fysikalisk kemi

Materialkemi

Annan kemi

DOI

10.1063/1.5137897

Mer information

Senast uppdaterat

2020-02-12