We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Spectral Signatures of Oxidation States in a Manganese‐Oxo Cubane Water Oxidation Catalyst.
- Authors
Mai, Sebastian; Klingler, Sarah; Trentin, Ivan; Kund, Julian; Holzer, Marcus; Andreeva, Anastasia; Stach, Robert; Kranz, Christine; Streb, Carsten; Mizaikoff, Boris; González, Leticia
- Abstract
We report IR and UV/Vis spectroscopic signatures that allow discriminating between the oxidation states of the manganese‐based water oxidation catalyst [(Mn4O4)(V4O13)(OAc)3]3−. Simulated IR spectra show that V=O stretching vibrations in the 900–1000 cm−1 region shift consistently by about 20 cm−1 per oxidation equivalent. Multiple bands in the 1450–1550 cm−1 region also change systematically upon oxidation/reduction. The computed UV/Vis spectra predict that the spectral range above 350 nm is characteristic of the managanese‐oxo cubane oxidation state, whereas transitions at higher energy are due to the vanadate ligand. The presence of absorption signals above 680 nm is indicative of the presence of MnIII atoms. Spectroelectrochemical measurements of the oxidation from [Mn2III Mn2IV ] to [Mn4IV ] showed that the change in oxidation state can indeed be tracked by both IR and UV/Vis spectroscopy.
- Subjects
OXIDATION of water; OXIDATION states; CATALYSTS; OXIDATION; SPECTROMETRY
- Publication
Chemistry - A European Journal, 2021, Vol 27, Issue 68, p17078
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202102583