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A dipyrenyl calixazacrown chemosensor for Mg |
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| Authors: | Abdelwaheb Hamdi Sang Hoon Kim Pierre Thuéry Jacques Vicens |
| Institution: | a Laboratoire d'Application de la Chimie aux Ressources et Substances Naturelles et à l'Environnement (LACReSNE), Faculté des Sciences de Bizerte, 7021 Bizerte, Tunisia b Department of Chemistry, Korea University, Seoul 136-701, Republic of Korea c CEA, IRAMIS, SCM, LCCEf, CNRS URA 331, Bât. 125, 91191 Gif-sur-Yvette, France d IPHC-ULP-ECPM-CNRS URA 7178, 25 rue Becquerel, F-67087 Strasbourg Cédex, France |
| Abstract: | A new fluorogenic calix4]tetraaza-crown-6 (4) bearing two pyrene amide groups has been prepared. It was shown to be selective for Mg2+. When Mg2+ is bound to 4, the pyrene monomer emission increased while the excimer emission declined in a ratiometric manner. It is shown by 1H NMR that this ratiometric change is due to the conformational changes of the pyrenes during the chelation of Mg2+ by the amide functions to form a 1:1 complex. |
| Keywords: | Calixarenes Fluorescence Detection Complexation Excimer Magnesium |
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