Photofragmentation Patterns of Cobalt Oxide Cations ConOm+ (n = 5–9, m = 4–13): From Oxygen-Deficient to Oxygen-Rich SpeciesClick to copy article linkArticle link copied!
- Nguyen Thi MaiNguyen Thi MaiInstitute of Materials Science and Graduate University of Science and Technology, Vietnam Academy of Science and Technology,10307 Hanoi, VietnamMore by Nguyen Thi Mai
- Son Tung NgoSon Tung NgoFaculty of Applied Science, Ton Duc Thang University, Ho Chi Minh City, VietnamLaboratory of Theoretical and Computational Biophysics, Ton Duc Thang University, Ho Chi Minh City, VietnamMore by Son Tung Ngo
- Peter LievensPeter LievensQuantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, 3001 Leuven, BelgiumMore by Peter Lievens
- Ewald Janssens*Ewald Janssens*E-mail: [email protected]Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, 3001 Leuven, BelgiumMore by Ewald Janssens
- Nguyen Thanh Tung*Nguyen Thanh Tung*E-mail: [email protected]Institute of Materials Science and Graduate University of Science and Technology, Vietnam Academy of Science and Technology,10307 Hanoi, VietnamMore by Nguyen Thanh Tung
Abstract
Cobalt oxide clusters, ConOm+ (5 ≤ n ≤ 9 and 4 ≤ m ≤ 13), are produced by laser vaporization and studied by time-of-flight mass spectrometry. Specific stoichiometries are mass separated and photofragmented using 355 nm laser light. The preferred fragmentation channels of m = n–1, m = n–2, and m ≥ n species are investigated. Loss of oxygen molecules is the favorable dissociation channel of m ≥ n clusters. While ConOn–2+ clusters decay via the loss of a Co atom, the photofragmentation behavior of ConOn–1+ species interestingly can be divided into two regimes: the n ≤ 6 clusters tend to lose an oxygen atom, but for n > 6 they favorably dissociate via the loss of a cobalt atom. The geometric structures of selected m = n – 2 species are studied using density functional theory calculations. Dissociation energies for different evaporation channels are calculated and thermodynamically favorable channels are found to correspond to the experimental observations.
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This article is cited by 2 publications.
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, 36031-36039. https://doi.org/10.1039/D4RA05482B
- Kobe De Knijf, Johan van der Tol, Piero Ferrari, Sandrien Scholiers, Gao-Lei Hou, Peter Lievens, Ewald Janssens. Influence of oxidation on the magnetism of small Co oxide clusters probed by Stern–Gerlach deflection. Physical Chemistry Chemical Physics 2022, 25
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, 171-182. https://doi.org/10.1039/D2CP05202D
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