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  On the competition between electron autodetachment and dissociation of molecular anions.

Marowsky, G., Troe, J., & Viggiano, A. A. (2019). On the competition between electron autodetachment and dissociation of molecular anions. Journal of The American Society for Mass Spectrometry, (in press). doi:10.1007/s13361-019-02237-z.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-B3FA-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-B3FE-5
Genre: Journal Article

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 Creators:
Marowsky, G., Author
Troe, J.1, Author              
Viggiano, A. A., Author
Affiliations:
1Emeritus Group of Spectroscopy and Photochemical Kinetics, MPI for Biophysical Chemistry, Max Planck Society, ou_578625              

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Free keywords: Anion dissociation; Electron autodetachment; Rotational channel switching
 Abstract: We treat the competition between autodetachment of electrons and unimolecular dissociation of excited molecular anions as a rigid-/loose-activated complex multichannel reaction system. To start, the temperature and pressure dependences under thermal excitation conditions are represented in terms of falloff curves of separated single-channel processes within the framework of unimolecular reaction kinetics. Channel couplings, caused by collisional energy transfer and “rotational channel switching” due to angular momentum effects, are introduced afterward. The importance of angular momentum considerations is stressed in addition to the usual energy treatment. Non-thermal excitation conditions, such as typical for chemical activation and complex-forming bimolecular reactions, are considered as well. The dynamics of excited SF6− anions serves as the principal example. Other anions such as CF3− and POCl3− are also discussed.

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Language(s): eng - English
 Dates: 2019-05-28
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1007/s13361-019-02237-z
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Title: Journal of The American Society for Mass Spectrometry
Source Genre: Journal
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Pages: - Volume / Issue: - Sequence Number: (in press) Start / End Page: - Identifier: -