Calix[4]arene-porphyrin Conjugates as Versatile Molecular Receptors for Anions
Organic Letters2003Vol. 5(2), pp. 149–152
Citations Over TimeTop 10% of 2003 papers
Abstract
[structure: see text] Appending tetraphenylporphyrin units to the calix[4]arene skeleton via the ureido function leads to novel anion receptors designed for anion and/or cation detection by UV-vis spectroscopy. Calixarenes in the cone or 1,3-alternate conformations bearing two ureido moieties on the upper rim represent well-preorganized cavities where the anion can be held by synchronous hydrogen bonding interaction with the NH groups.
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