Investigation of homo- and heterodimer alkali metal cation complexes of resorc[4]arenes by electrospray ionization mass spectrometry |
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Authors: | Letzel Matthias C Agena Ceno Mattay Jochen |
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Institution: | Universit?t Bielefeld, Postfach 100131, 33501 Bielefeld, Germany. |
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Abstract: | Resorc4]arenes are compounds with interesting properties, mainly because of their ability to form host-guest complexes with the guest located inside the cavity. The size of the guest limits the complexation, as shown by a competition experiment with tetraalkylammonium ions of different size. By electroscopy ionization tandem mass spectrometric experiments on resorc4]arene heterodimers bearing an alkali metal ion as guest, it was found that there must be two different binding mechanisms for alkali metal ions with high surface charge density (Li(+) and Na(+)) on the one hand compared with those with a lower surface charge density on the other hand (K(+), Rb(+), Cs(+)). |
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Keywords: | resorc[4]arenes heterodimer and homodimer complexes electrospray mass spectrometry relative complex stability |
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