Abstract
It was repeatedly shown in Chapter 1 that the absorption of energy by molecular systems above their first ionization energy results in the creation of all possible electronic states of the molecular ion allowed by the appropriate selection rules. The decay of such excited electronic states of molecular ions can take place either by emission of radiation or by successive non radiative processes. Allowed emission of radiation requires times ranging from 10−9 to 10−7 s. Other decay processes are generally faster than radiative desexcitation, e.g. direct dissociation (10−14 to 10−13 s) and non-radiative transitions, precisely invoked when the radiative emissions are completely quenched.
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References
Landau L, Lifschitz E, Mecanique Quantique, 2nd edn. Edition MIR. Moscow 1967 p 423
Teller E (1937) The Crossing of Potential Surfaces. J Phys Chem 41: 109–116
Sakei S, Kato S, Morokuma K, Kusunoki I (1981) Potential Energy Surfaces of the Reaction C+ + H2 → CH+ + H. J Chem Phys 75: 5398–5409
Desouter-Lecomte M, Dehareng D, Leyh-Nihant B, Praet MT, Lorquet AJ, Lorquet JC (1985) Nonadiabatic Unimolecular Reactions of Polyatomic Molecules. J Phys Chem 89: 214–222
Desouter-Lecomte M, Leyh-Nihant B, Praet MT, Lorquet JC (1987) Avoided Crossings: A Study of the Nonadiabatic Transition Probabilities. J Chem Phys 86: 7025–7034
Herzberg G (1966) Molecular Spectra and Molecular Structure III. Electronic Spectra and Electronic Structure of Polyatomic Molecules. Van Nostrand Reinhold Company, New York
Maier JP (1979) Decay Processes of the Lowest Excited Electronic States of Polyatomic Radical Cations. In: Ausloos P (ed) Kinetics of Ion-Molecule Reactions, Vol B40. Plenum Press, New York
Leach S, Dujardin G, Taieb G (1980) Radiationless Transitions in Gas Phase Molecular Ions. J de Chim Physique et de Physico-Chimie Biologique 77: 705–718
Maier JP (1982) Open-Shell Organic Cations: Spectroscopic Studies by Means of their Radiative Decay in the Gas Phase. Acc Chem Res 15: 18–23
Dannacher J (1980) Photoelectron-Photoion Coincidence Study of Polyatomic Radical Cations for which Competition between Radiative and Dissociative Decay is Observed. Adv Mass Spectrom 8A: 37–46
Stadelmann JP, Vogt J (1980) Isolated State Dissociations from Electronically Excited Radical Cations of Fluoroethenes Studied by Photoelectron-Photoion Coincidence Spectroscopy. Adv Mass Spectrom 8A: 47–55
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© 1992 Springer-Verlag Berlin Heidelberg
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Illenberger, E., Momigny, J. (1992). The Occurrence of Transitions between the Electronic States of Molecular Ions. In: Gaseous Molecular Ions. Topics in Physical Chemistry, vol 2. Steinkopff, Heidelberg. https://doi.org/10.1007/978-3-662-07383-4_5
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DOI: https://doi.org/10.1007/978-3-662-07383-4_5
Publisher Name: Steinkopff, Heidelberg
Print ISBN: 978-3-662-07385-8
Online ISBN: 978-3-662-07383-4
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