Abstract
The effects of the heteroatom donor on the complexation of various metal ions by macrocyclic polyethers were qualitatively examined by application of the ligand exchange technique in a quadruple ion trap mass spectrometer. The metal ions, including K+, Cs+, Al+, Mg+, Cu+ and Ni+, were generated by laser desorption and allowed to react with 12-crown-4 and its nitrogen and sulfur analogs, cyclen and 1,4,7,10-tetrathiacyclododecane. The orders of gas-phase basicities were established as a comparison. The relative K+ and Cs+ binding affinities of 12-crown-4 are greatest, whereas cyclen has the highest binding affinity for all the other metal ions and also the highest gas-phase basicity.
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Wu, HF., Brodbelt, J.S. Influence of heteroatom donors on the orders of relative gas-phase binding affinities of macrocyclic polyethers. J Incl Phenom Macrocycl Chem 18, 37–44 (1994). https://doi.org/10.1007/BF00706937
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DOI: https://doi.org/10.1007/BF00706937