期刊
DALTON TRANSACTIONS
卷 42, 期 34, 页码 12157-12164出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3dt51216a
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资金
- Tunisian Ministry of Higher Education and Scientific Research
- CNRS
- Conseil Regional Champagne Ardenne
- Conseil General de la Marne
- Ministry of Higher Education and Research (MESR)
- EU
A new cyclen derivative L, bearing a methyl-chromeno-pyridinylidene hydrazone moiety, was synthesized and studied in MeOH, as potential fluorescent OFF-on-ON sensors for Zn(II). Photophysical properties of this ligand being PET regulated, L was only weakly emissive in the absence of metal ions (OFF). L fluorescence was increased modestly upon addition of one equivalent of Zn(II), and further increased upon addition of a second equivalent. Therefore, Zn : L behaved as a highly sensitive ON sensor for zinc. This efficiency was correlated to Zn(II) coordination via the hydrazone moiety of the fluorophore, producing an efficient CHelation-Enhanced Fluorescence (CHEF) effect. A complementary theoretical study carried out with DFT calculations further elucidated the optical properties.
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