2,2′-Bipyridine Lariat Calixcrowns: A New Class of Encapsulating Ligands Forming Highly Luminescent Eu3+ and Tb3+ Complexes
作者:Claudia Fischer、Gianluca Sarti、Alessandro Casnati、Barbara Carrettoni、Ilse Manet、Ruud Schuurman、Massimo Guardigli、Nanda Sabbatini、Rocco Ungaro
DOI:10.1002/(sici)1521-3765(20000317)6:6<1026::aid-chem1026>3.0.co;2-c
日期:2000.3.17
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.