Abstract:
The adsorption and surface ionization of thebaine molecules (Ñ$_{19}$Í$_{21}$Î$_3$N) c $m/z$ = 311 on the surface of oxidized tungsten was studied by non-stationary methods of voltage modulation and flux modulation under the same experimental conditions using a high-vacuum mass spectrometric setup using a “black chamber” all walls of which are cooled with liquid nitrogen. The rate constants $K^d$ and the activation energy Ed of the reaction of dissociation of previously adsorbed thebaine molecules with bond cleavage (C-C$_1$)$_\beta$ with the formation of ionizable radicals by surface ionization have been determined. The rate constants $K^0$ and activation energies of thermal desorption $E^0$, as well as the pre-exponential factors in the continuity equation for Ñ$_{11}$Í$_{12}$ÎN$^+$ ($m/z$ = 174) were determined during the adsorption of thebaine molecules Ñ$_{19}$Í$_{21}$Î$_3$N with $m/z$ = 311.
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