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Mechanism of negative ion formation from phenol and para‐chlorophenol by interaction with free electrons
Author(s) -
Muftakhov Mars V.,
Khatymov Rustem V.,
Mazunov Victor A.
Publication year - 2000
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/1097-0231(20000830)14:16<1468::aid-rcm49>3.0.co;2-p
Subject(s) - chemistry , phenol , ionic bonding , ion , benzene , chlorophenol , resonance (particle physics) , molecule , ionization , chlorine , photochemistry , phenols , computational chemistry , chemical physics , organic chemistry , atomic physics , physics
Dissociative electron attachment (DEA) to phenol and para ‐chlorophenol in the energy range 0–12 eV is studied. Analogies in formation of the resonance states in an ionic benzene and its derivatives are found to arise from the similarity of the aromatic base of the molecules. Differences in DEA processes are defined mainly by the influence of the functional OH‐group and, to a lesser degree, by the presence of a chlorine atom. A correlation between the energies of the resonance states and ionization energies of p ‐chlorophenol and phenol, analogous to that found previously for phenol, is proved. On this basis it is established that the dominating mechanism for formation of molecular negative ions at energies above 5 eV is Feshbach resonance.Copyright © 2000 John Wiley & Sons, Ltd.