Cluster ions in the secondary ion mass spectrometry of choline and acetylcholine halides

✍ Scribed by Mamoru Ohashi; Takashi Lino; Tomoyuki Takahashi; Michiaki Yoneda; Soichiro Kyushin; Kazuo Tsujimoto

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 455 KB
• Volume: 25
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210250205

✦ Synopsis

Abstract

Liquid secondary ion mass spectra of choline and acetylcholine halides exhibit several series of cluster ions whose origins were investigated using B/E and B^2^/E linked‐scan techniques. In the case of choline halides three series of cluster ions were identified as (Me~3~\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm N}\limits^ + $\end{document}CH~2~CH~2~OH + __n__M), (Me~3~\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm N}\limits^ + $\end{document}CH~2~CH~2~OMe + __n__M) and (Me~3~N\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm N}\limits^ + $\end{document}CH~2~CH~2~OH · Me~3~\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm N}\limits^ + $\end{document}CH~2~CH~2~O^−^ + __n__M), while (CH~3~COOCH~2~CH~2~\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm N}\limits^ + $\end{document}Me~3~ + __n__M), (Me~3~\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm N}\limits^ + $\end{document}CH~2~CH~2~OH + __n__M) and (CH~2~ = CH\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm N}\limits^ + $\end{document}Me~3~ + __n__M) were observed in the spectra of acetylcholine halides. For these cluster ions, bimolecular reactions induced on ion bombardment under secondary ion mass spectrometric conditions are discussed.