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Characterization of supramolecular complexes by high resolution electrospray ionization mass spectrometry

✍ Scribed by Gérard Hopfgartner; Francis Vilbois; Claude Piguet

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
85 KB
Volume
13
Category
Article
ISSN
0951-4198

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✦ Synopsis

High resolution mass spectrometry on time-of-flight (TOF) and ion trap (IT) mass spectrometers is used for the qualitative speciation of a heterodimetallic triple-stranded helicate [EuFe(L 1 ) 3 ](CIO 4 ) 5 and a toroidal complex [Ni 3 (L 2 ) 3 ](CIO 4 ) 6 (= circular single-stranded helicate) dissolved in acetonitrile. The resolution of about 5000 at peak width at half height using ion trap mass spectrometry (ITMS) and time-of-flight mass spectrometry (TOFMS) combined with electrospray ionization (ESI) is sufficient to resolve sextuply charged ions leading to a straightforward characterization of the complexes in solution. The ESI-MS response is influenced by the interface design, particularly for the heated capillary interface which requires optimized conditions for the study of non-covalent complexes.

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