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Electrochemical thermospray mass spectrometry - a method for the investigation of the first steps of polymerization.

Elektrochemische Thermospray-Massenspektrometrie - Eine Methode zur Untersuchung der ersten Reaktionsstufen bei Polymerisationen
: Hambitzer, G.; Heinz, P.P.; Stassen, I.; Heitbaum, J.


Synthetic metals 55-57 (1993), S.1317-1322
ISSN: 0379-6779
Fraunhofer ICT ()
electrode process; mass spectrometry; non-aqueous electrolyte; polymerization; thermospray

For the study of electrode processes the combination of Thermospray Mass Spectrometry and electrochemistry proves to be a powerful on-line technique. Products generated electrochemically in a special thin layer flow cell are transferred directly into a thermospray ion source. With a response time of approximately one second, nonvolatile products and intermediates are detected by a quadrupole mass spectrometer. This method was first applied to the anodic oxidation of N,N-dialkylanilines in neutral aqueous solution at Pt- and Au-electrodes. The known mechanism, which appeared quiet simple at first sight, was extended into a complex reaction scheme. one side reaction led to higher oligomers. By constructing a new, dual beam thermospray ion source, the study of reactions in non- aqueous electrolyte solutions was possible. This system was tested by clarifying the oxidation process of phenothiazine in a methanollammonium acetate electrolyte.