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Formation of cryptophanes from their precursors as viewed by liquid secondary ion mass spectrometry

✍ Scribed by Thierry Brotin; Magali Darzac; Danièle Forest; Michel Becchi; Jean-Pierre Dutasta

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
152 KB
Volume
36
Category
Article
ISSN
1076-5174

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✦ Synopsis

Abstract

The formation of cryptophane‐A (C1) and the deuterated cryptophanes C2–C6 from their respective precursors P1–P6 in a mass spectrometer ion‐source was evidenced by liquid secondary ion mass spectrometry (LSIMS). Mass‐analyzed ion kinetic energy experiments performed on the precursor molecular ions suggested that cryptophane formation occurred mainly in the liquid‐matrix before desorption rather than in the gas phase. In addition, we observed that the presence of cations, such as lithium or sodium ions, inhibited the formation of the cryptophane molecular ions. In the light of these results we used the LSIMS technique to investigate the formation of the new cryptophanes C7–C13. All the data collected support the idea that a direct comparison can be made between these experimental findings and chemistry in solution. Copyright © 2001 John Wiley & Sons, Ltd.

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