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Application of surface ionization to determine rate constant and activation energy of dissociation reactions of nitrogen base polyatomic molecules on W oxides
Author(s) -
Rakhmanov G.,
Rasulev U. Kh.,
Saidumarov I.
Publication year - 2006
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.2206
Subject(s) - chemistry , activation energy , reaction rate constant , dissociation (chemistry) , polyatomic ion , molecule , desorption , radical , ionization , adsorption , bond dissociation energy , ionization energy , nitrogen , analytical chemistry (journal) , ion , inorganic chemistry , organic chemistry , kinetics , physics , quantum mechanics
Adsorption and surface ionization of procaine, imipramine, amitriptyline and tetraethylammonium chloride on oxidized tungsten surface have been studied by the methods of voltage modulation and flux modulation under identical experimental conditions with the high‐vacuum mass‐spectrometric set up having a ‘black’ chamber with the walls cooled with liquid nitrogen. Rate constants and activation energies of dissociation reaction of initially adsorbed molecules by (C–C) β bonds with formation of radicals to be ionized have been defined. Also, rate constants and activation energy of desorption of these radicals as ions (CH 3 ) 2 N + CH 2 and (C 2 H 5 ) 2 N + CH 2 have been determined. Copyright © 2006 John Wiley & Sons, Ltd.