Fast atom bombardment mass spectrometry of alkali metal fluorides and chlorides; a comparison of the solid salt and glycerol matrix spectra

1985 ◽  
Vol 20 (10) ◽  
pp. 600-605 ◽  
Author(s):  
Jack M. Miller ◽  
Roger Theberge
Keyword(s):  
Mass Spectrometry ◽  
Alkali Metal ◽  
Fast Atom Bombardment ◽  
Solid Salt ◽  
Metal Fluorides ◽  
Glycerol Matrix

Coordination of alkali metal cation to oxygen functions to form adduct ion in fast atom bombardment mass spectrometry

Tetrahedron ◽  
1996 ◽  
Vol 52 (27) ◽  
pp. 9017-9024 ◽  
Author(s):  
Naoko Morisaki ◽  
Kazuhiko Inoue ◽  
Hisayoshi Kobayashi ◽  
Ryuichi Shirai ◽  
Masuo Morisaki ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Alkali Metal ◽  
Metal Cation ◽  
Fast Atom Bombardment ◽  
Alkali Metal Cation

Fast atom bombardment mass spectrometry of sulphated metabolites of the steroid org OD 14 using a glycerol matrix saturated with tetramethylammonium hydroxide

1992 ◽  
Vol 21 (10) ◽  
pp. 491-499 ◽  
Author(s):  
Peter L. Jacobs ◽  
Gerrit J. H. Schmeits ◽  
Marcel P. De Vries ◽  
Leon P. C. Delbressine ◽  
Harry A. M. Peters
Keyword(s):  
Mass Spectrometry ◽  
Fast Atom Bombardment ◽  
Tetramethylammonium Hydroxide ◽  
Glycerol Matrix

The mechanism of formation of 2,7-dimethyl-2,6-octadiene in the synthesis of 3-methylene-7-methyl-1,6-octadiene

1983 ◽  
Vol 48 (7) ◽  
pp. 1864-1866
Author(s):  
Jan Bartoň ◽  
Ivan Kmínek
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Alkali Metal ◽  
Chromatographic Analysis ◽  
Solid Phase ◽  
Reaction Pathway ◽  
Mechanism Of Formation ◽  
Gas Chromatographic Analysis ◽  
C Nmr ◽  
Visual Observations

2,7-Dimethyl-2,6-octadiene is formed in the catalytic solution for the dimerization of 2-methyl-1,3-butadiene to β-myrcene (3-methylene-7-methyl-1,6-octadiene), as revealed by mass spectrometry and 13C NMR spectroscopy. Visual observations together with the results of gas chromatographic analysis of the catalytic solution suggest that the formation of 2,7-dimethyl-2,6-octadiene is associated with the transition of the alkali metal (sodium) from the solid phase into the solution. A reaction pathway is suggested accounting for the formation of 2,7-dimethyl-2,6-octadiene in the system.

Effects of Doping on the Electrochemical and Electrical Properties of Poly(2,5-di(2-thienyl)pyrrole)

1999 ◽  
Vol 64 (8) ◽  
pp. 1357-1368 ◽  
Author(s):  
Enric Brillas ◽  
José Carrasco ◽  
Ramon Oliver ◽  
Francesc Estrany ◽  
Víctor Ruiz
Keyword(s):  
Mass Spectrometry ◽  
Fast Atom Bombardment ◽  
Oxidation Potential ◽  
Ethanolic Solution ◽  
Pt Electrode ◽  
Reversible Process ◽  
Oxidation Potentials ◽  
Lower Productivity ◽  
Polymeric Chains ◽  
Linear Molecules

The electropolymerization of 2,5-di(2-(thienyl)pyrrole) (SNS) on a Pt electrode from ethanolic solution with LiClO4 or LiCl as electrolyte has been studied by cyclic voltammetry (CV) and chronoamperometry (CA). In both media, a quasi-reversible process has been indicated by CV, reversing the scan at low oxidation potentials. Under these conditions, reducible positive charges formed in both oxidized polymers are compensated by the entrance of anions from solution. Elemental analysis reveals that polymers generated at a low oxidation potential by CA contain a 21.03% (w/w) of ClO4- or a 9.56% (w/w) of Cl-. The poly(SNS) doped with Cl- presents higher proportion of reducible positive charges, higher polymerization charge and lower productivity. A much higher electrical conductivity, however, has been found for the poly(SNS) doped with ClO4-. Both polymers are soluble in DMSO, acetone and methanol. The dimer, trimer, tetramer and pentamer have been detected as soluble and neutral linear oligomers by mass spectrometry-fast atom bombardment. The analysis of polymers by infrared spectroscopy confirms the predominant formation of linear molecules with α-α linkages between monomeric units. A condensation mechanism involving one-electron oxidation of all electrogenerated linear and neutral polymeric chains is proposed to explain the SNS electropolymerization.

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