Hemicucurbit[6]uril, a selective ligand for the complexation of anions in aqueous solution

The ligand hemicucurbit[6]uril only forms complexes with thiocyanate and iodide in aqueous solution. The complexation is studied using the increase in solubility of the ligand in the presence of salts. The complex formation between hemicucurbit[6]uril and different cations and anions has been studie...

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Bibliographic Details
Published inInorganic chemistry communications Vol. 8; no. 1; pp. 125 - 127
Main Authors Buschmann, H.-J., Cleve, E., Schollmeyer, E.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2005
Subjects
Anion complexes
Complexes
Hemicucurbituril
Iodide
Solubility
Thiocyanate
Hemicucurbituril
Iodide
Anion complexes
Complexes
Thiocyanate
Solubility
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Summary:The ligand hemicucurbit[6]uril only forms complexes with thiocyanate and iodide in aqueous solution. The complexation is studied using the increase in solubility of the ligand in the presence of salts. The complex formation between hemicucurbit[6]uril and different cations and anions has been studied using a new experimental technique. Due to the low solubility of this macrocyclic ligand, none of the common methods can be used to study the reactions in aqueous solution. The solubility of the ligand increases in the presence of salts. From these measurements, the stability constants of the complexes formed can be calculated. Hemicucurbit[6]uril does not form complexes with cations in aqueous solution. However, this ligand forms a strong complex with thiocyanate and iodide. No further anions are found so far which form complexes with hemicucurbit[6]uril.
ISSN:1387-7003
1879-0259
DOI:10.1016/j.inoche.2004.11.020