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Formation of diethylamine thermal ionization mass spectrum on NaAu x intermetallide
Author(s) -
Knatko Mikhail V.,
Lapushkin Mikhail N.
Publication year - 2021
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/rcm.9144
Subject(s) - diethylamine , chemistry , mass spectrum , mass spectrometry , analytical chemistry (journal) , thermal ionization , intermetallic , thermal desorption , ionization , electron ionization , adsorption , desorption , ion , organic chemistry , chromatography , alloy
Rationale The mass spectra of amine thermal ionization on intermetallic NaAu x emitters differ significantly from those of the same compounds on the surfaces of transition metals and their oxides. The factors underlying these differences are determined through studying the processes taking place on intermetallic surfaces, which give rise to the corresponding mass spectra. Methods The dependence of mass spectral composition and individual line intensity of diethylamine thermal ionization on intermetallic NaAu x surface on diethylamine pressure, oxygen, sodium atom current and emitter temperature was studied using a magnet sector mass spectrometer. Results Diethylamine mass spectral composition is determined by the reaction between the molecules adsorbed on the NaAu x surface. Oxygen and sodium concentration on the surface does not affect the mass spectral composition. Mass line intensity depends on diethylamine pressure and emitter temperature affecting the reaction efficiency on the surface. Conclusions Intermetallic NaAu x is an ionic semiconductor that can provide sufficient lifetime for adsorbed molecules to efficiently interact with each other and with their decomposition products. This creates unique conditions for the formation of various compounds on the surface with their mass exceeding by 2.5 times that of diethylamine.