Czech Society for Mass Spectrometry

(1st Conference of the Czech Society for Mass Spectrometry - ThP-008)
ESI-MS investigation of the complexation behavior of macrocyclic thiacrown ethers and bivalent transition metals

Alexandra Tsybizova ^1 *, Detlef Schröder ¹

1. Institute of Organic Chemistry and Biochemistry

Abstract

Electrospray ionization mass spectrometry (ESI-MS) was used to study the complexation behavior of three newly synthetized¹ thia-macrocycles (1-3) with different 3d metal chlorides (i.e. CuCl₂, CoCl₂, NiCl₂, and ZnCl₂). The study demonstrates that the thiacrown ethers preferentially bind traces of copper even in the excess of other metal ions. The binding process is accompanied by the reduction from Cu^II to Cu^I and the formation of [(thiacrown)Cu]⁺ species. By use of 18-crown-6 as a reference the absolute association constants are evaluated.

* Corresponding author: tsybizova@uochb.cas.cz

References

1. Holý P. et al.: Synthesis 24, 4169-4176 (2010).