Photodissociation of permanganate (MnO 4 − ) produces the manganese dioxide anion (MnO 2 − ) in an excited triplet state

Gibbard, Jemma A.; Reppel, Jonathan; Verlet, Jan. R. R.

Abstract

Photoelectron imaging, electron action spectroscopy and electronic structure calculations are used to probe the structure and dynamics of MnO4−. Following excitation to the first bright absorption band of MnO4− (11T2), photodetachment, via ground state electron loss, and photodissociation, to produce MnO2−, are both observed to occur simultaneously. MnO2− is produced in an excited electronic state, identified as a triplet state, which indicates that the dissociation proceeds on singlet potential energy surfaces via spin conservation. Furthermore, electronic structure calculations indicate that both photodetachment and photodissociation are multiple photon processes that are mediated by the same 11T2 excited state. Taken together this data indicates that photodissociation of MnO4− occurs via a statistical dissociation on the MnO4− ground state at visible wavelengths.

Citation

Gibbard, J. A., Reppel, J., & Verlet, J. R. R. (2023). Photodissociation of permanganate (MnO 4 − ) produces the manganese dioxide anion (MnO 2 − ) in an excited triplet state. Physical Chemistry Chemical Physics, 25(48), 32939-32947. https://doi.org/10.1039/d3cp04576e

• Journal Article Type: Article
• Acceptance Date: Nov 23, 2023
• Online Publication Date: Nov 29, 2023
• Publication Date: Dec 28, 2023
• Deposit Date: Dec 4, 2023
• Publicly Available Date: Dec 6, 2023
• Journal: Physical Chemistry Chemical Physics
• Print ISSN: 1463-9076
• Electronic ISSN: 1463-9084
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 25
• Issue: 48
• Pages: 32939-32947
• DOI: https://doi.org/10.1039/d3cp04576e
• Public URL: https://durham-repository.worktribe.com/output/1965652