A new class of calix[4]arene crown ethers with one or two bipyridines appended to the polyether ring (lariat calixcrowns) have been designed and synthesized; the luminescence properties of their Eu3+ and Tb3- complexes have been studied in acetonitrile. In this solvent, long lifetimes for the metal emitting states and high metal-luminescence intensities obtained upon ligand excitation have been observed in both Eu3+ and Tb3+ complexes The association constants in methanol have been determined for some of the complexes studied.
2,2'-Bipyridine Lariat-Calixcrowns: A New Class of Encapsulating Ligands Forming Highly Luminescent Eu3+ and Tb3+ Complexes / Fischer, C.; Sarti, G.; Casnati, Alessandro; Carrettoni, B.; Manet, I.; Schuurman, R.; Guardigli, M.; Sabbatini, N.; Ungaro, Rocco. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - 6:(2000), pp. 1026-1034. [10.1002/(SICI)1521-3765(20000317)6:6<1026::AID-CHEM1026>3.0.CO;2-C]
2,2'-Bipyridine Lariat-Calixcrowns: A New Class of Encapsulating Ligands Forming Highly Luminescent Eu3+ and Tb3+ Complexes
CASNATI, Alessandro;UNGARO, Rocco
2000-01-01
Abstract
A new class of calix[4]arene crown ethers with one or two bipyridines appended to the polyether ring (lariat calixcrowns) have been designed and synthesized; the luminescence properties of their Eu3+ and Tb3- complexes have been studied in acetonitrile. In this solvent, long lifetimes for the metal emitting states and high metal-luminescence intensities obtained upon ligand excitation have been observed in both Eu3+ and Tb3+ complexes The association constants in methanol have been determined for some of the complexes studied.| File | Dimensione | Formato | |
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