Abstract
The complex formation between cucurbit[5]uril, decamethylcucurbit[5]uril and cucurbit[6]uril and alkali, alkaline earth and ammonium cations is examined. The solubility of these ligands is rather small in aqueous solution. In the presence of salts the solubility normally increases due to the formation of complexes. The total concentration of the ligands can be easily measured from the total organic carbon content of the salt solutions saturated with the ligand. From these results it is possible to calculate the stability constants of the complexes formed even without the knowledge of the exact solubility of the ligand.
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Buschmann, HJ., Cleve, E., Jansen, K. et al. Complex Formation between Cucurbit[n]urils and Alkali, Alkaline Earth and Ammonium Ions in Aqueous Solution. Journal of Inclusion Phenomena 40, 117–120 (2001). https://doi.org/10.1023/A:1011159119554
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DOI: https://doi.org/10.1023/A:1011159119554