Mass spectrometric investigations of plasma chemical reactions in a radiofrequency discharge with Ar/C2H2and Ar/C2H2/O2gas mixtures

2017 ◽  
Vol 121 (12) ◽  
pp. 123303 ◽  
Author(s):  
Ann-Pierra Herrendorf ◽  
Vladimir Sushkov ◽  
Rainer Hippler
Keyword(s):  
Chemical Reactions ◽  
Mass Spectrometric ◽  
Plasma Chemical ◽  
Radiofrequency Discharge

Mass Spectrometry of Oligomeric Cyanines and Squaraines of the Indole Series: Fast Atom Bombardment-Induced Chemical Reactions

2002 ◽  
Vol 57 (4) ◽  
pp. 393-398 ◽  
Author(s):  
Thomas Dülcks ◽  
Walter Grahn ◽  
Hans-Hermann Johannes ◽  
Ulf Lawrentz ◽  
Miriam Rittner ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Chemical Reactions ◽  
Relative Abundance ◽  
Fast Atom Bombardment ◽  
Mass Spectrometric ◽  
Indole Series

Fast atom bombardment (FAB) has been used for mass spectrometric characterization of oligomeric cyanines and squaraines of the indole series which are linked by different aromatic spacers. Markedly different results were obtained for the oligomers and for the corresponding monomers. In addition to the expected mono-anions and mono-cations, ions of high relative abundance were detected which can only be explained on the basis of FAB-induced chemical reactions of the initial oligomers. Formation of allenes, hydrogenation and dehydrogenation, respectively, is characteristic for this class of compounds under FAB-conditions.

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