Abstract
In-beam Mössbauer spectroscopy of 57Fe using a short-lived 57Mn (T1/2 = 89 s) implantation was applied to study the chemical products of localized Fe atoms in ethylene and acetylene matrices at low temperatures. The spectra obtained in both matrices were analyzed as three doublets. In ethylene at 14 K, Fe(C2H4)2 (Fe0, S = 1), [Fe(C2H4)3]+ (Fe+, S = 3/2), and [Fe(C2H4)2]+ (Fe+, S = 3/2) were assigned as derived from the Mössbauer parameters and density functional theory calculations. On the other hand, the products of [Fe(C2H2)2]+ (Fe+, S = 3/2) and [(C2H2)FeCCH2]+ (Fe+, S = 3/2) were determined in the acetylene matrix at 17 K.
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Acknowledgments
This work was partially supported by Grants-in-Aid for Scientific Research (C) (Research Project Numbers 25410062 and 16K05012) of the Japan Society for the Promotion of Science (JSPS). We are thankful to Dr. Atsushi Okazawa for the synthesis of 58Fe-enriched ferrocene as an ion source of the primary beam, and the operating staff at HIMAC in NIRS.
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This article is part of the Topical Collection on Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2017), Saint-Petersburg, Russia, 3–8 September 2017
Edited by Valentin Semenov
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Kobayashi, Y., Yamada, Y., Kubo, M.K. et al. Chemical reactions of localized Fe atoms in ethylene and acetylene matrices at low temperatures using in-beam Mössbauer spectroscopy. Hyperfine Interact 239, 18 (2018). https://doi.org/10.1007/s10751-018-1494-2
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DOI: https://doi.org/10.1007/s10751-018-1494-2