The interaction of a calix [4]arene-based species containing two 8-oxyquinoline chromophore pendants with hazardous metal ions has been investigated using optical absorption and fluorimetric techniques. In the presence of Hg 2+ , Cd 2+ , and Pb 2+ ions, there is only a small decrease of the calixarene absorption band at 283 nm. The main changes are associated with the absorption band of the 8-oxyquinoline group at 315 nm, undergoing a systematic bathochromic shift to above 350 nm. In addition, a systematic decrease of the oxyquinoline emission at l em = 392 nm (l exc = 315 nm) has been observed. These observations are consistent with the coordination of the metal ions to the quinoline groups attached to the calixarene ligand, providing a useful fluoroinophore species for analytical purposes.Résumé : Faisant appel aux techniques d'absorption optique et fluorimétrique, on a étudié les réactions d'interaction entre des ions métalliques dangereux et des espèces à base de calix[4]arène contenant deux chromophores pendants 8-oxyquinoléine. En présence des ions Hg 2+ , Cd 2+ et Pb 2+ , on n'observe qu'une faible diminution de la bande l'absorption du calixarène à 283 nm. Les principaux changements sont associés à la bande d'absorption du groupe 8-oxyquinoléine à 315 nm qui subit un déplacement bathochrome systématique au-dessus de 350 nm. De plus, on observe une diminution systématique de l'émission de l'oxyquinoléine à lém = 392 nm (lexc = 315 nm). Ces observations sont en accord avec une coordination des ions métalliques par les groupes quinoléines attachés au ligand calixarène, fournissant une espèce fluoroionophore pour des besoins analytiques.
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