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Searching for New Luminescent Sensors: Synthesis and Photophysical Properties of a Tripodal Ligand Incorporating the Dansyl Chromophore and of Its Metal Complexes
Author(s) -
Prodi Luca,
Bolletta Fabrizio,
Montalti Marco,
Zaccheroni Nelsi
Publication year - 1999
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199903)1999:3<455::aid-ejic455>3.0.co;2-9
Subject(s) - chromophore , chemistry , luminescence , ligand (biochemistry) , intramolecular force , photochemistry , acetonitrile , fluorescence , metal ions in aqueous solution , metal , selectivity , stereochemistry , organic chemistry , biochemistry , physics , receptor , optoelectronics , quantum mechanics , catalysis
The new tripodal ligand 1 containing the dansyl chromophore has been synthesized and characterized. The intense luminescence characteristic of the chromophore is maintained in the ligand structure, showing that no intramolecular interactions are present. This ligand has been shown to complex in acetonitrile/water solutions only with Cu 2+ , Co 2+ , Zn 2+ , and Cd 2+ ions, with concomitant pronounced changes in the fluorescence spectra. The complexation is controlled by pH conditions: at neutral pH this ligand shows a remarkable selectivity towards Cu 2+ ions, suggesting a possible use for 1 as a luminescent chemosensor for this ion.