Observation and photoelectron spectroscopic study of novel mono- and diiron oxide molecules FeO{sub y}{sub -} (y = 1-4) and Fe{sub 2}O{sub y}{sub -} (y = 1-5)

Journal Article · Wed Jun 05 04:00:00 EDT 1996 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja954153b· OSTI ID:263140

Wu, H; Desai, S R; Wang, L S ^[1]

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1. Washington State Univ., Richland, WA (United States)

We study novel iron oxide molecules involving one and two iron atoms by anion photoelectron spectroscopy at 3.49 and 4.66 eV photon energies. Vibrationally resolved photoelectron spectra and low-lying excited states are obtained for FeO{sub y}{sub -} (y = 1-4) and Fe{sub 2}O{sub y}{sub -} (y = 1-5). In both series, the photoelectron spectra become particularly sharp and better resolved for the higher oxides, FeO{sub 3}{sub -}, FeO{sub 4}{sub -}, Fe{sub 2}O{sub 4}{sub -}, and Fe{sub 2}O{sub 5}{sub -}. The electron affinity of the neutral oxide molecules is observed to increase with the number of oxygen atoms, suggesting a sequential oxidation behavior. For the monoiron oxide series, an oxidation saturation is observed as evidenced by the leveling-off of the electron affinity from FeO{sub 3} to FeO{sub 4}. The structures and chemical bonding of these oxide molecules are discussed based on the sequential oxidation behavior. Isomers involving possibly O{sub 2} or O{sub 3} complexes are also observed for the diiron oxides above Fe{sub 2}O. 39 refs., 7 figs., 2 tabs.

• DOE Contract Number: AC06-76RL01830
• OSTI ID: 263140
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 22 Vol. 118; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
AFFINITY
ANIONS
ELECTRON SPECTRA
EXCITED STATES
IRON OXIDES
ISOMERS
MOLECULAR STRUCTURE
MOLECULES
OXIDATION