An imine-based molecular cage with distinct binding sites for small and large alkali metal cations
| Autor: | Kay Severin, Rosario Scopelliti, Clément Schouwey |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
alkali metals
cooperativity Imine Inorganic chemistry Supramolecular chemistry receptors Cooperativity Alkalies 010402 general chemistry 01 natural sciences Catalysis supramolecular chemistry chemistry.chemical_compound Cations Binding site Binding Sites 010405 organic chemistry Metals Alkali Organic Chemistry General Chemistry self-assembly Alkali metal 0104 chemical sciences Crystallography chemistry Self-assembly Imines Selectivity Cage |
| Zdroj: | Chemistry-A European Journal |
| DOI: | 10.1002/chem.201300098 |
| Popis: | The synthesis of a cylindrical imine based cage composed of two trimeric metallamacrocycles is described. The cage acts as a heterotopic receptor for alkali metal cations. The small cations Li+ Na+ and K+ bind to the outside of the cage with good selectivity for Li + whereas the larger cations Rb+ and Cs+ are bound inside the cage to form unusual p complexes with a good selectivity for Cs+. Negative heterotopic cooperativity between the two binding sites is observed. The complexation of Cs+ is associated with a color change which enables the cage to be used as a specific sensor for Cs +. Copyright © 2013 WILEY VCH Verlag GmbH Co. KGaA Weinheim. |
| Databáze: | OpenAIRE |
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