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A modified cyclen azaxanthone ligand as a new fluorescent probe for Zn2+

Nouri, Hela
Cadiou, Cyril
Chevreux, Sylviane
Déchamps-Olivier, Isabelle
Lachaud, Fabien
Ternane, Riadh
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Published in Dalton transactions. 2013, vol. 42, no. 34, 12157
Abstract 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). Photocphysical 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 of the optical properties.
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Other version: http://xlink.rsc.org/?DOI=c3dt51216a
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NOURI, Hela et al. A modified cyclen azaxanthone ligand as a new fluorescent probe for Zn2+. In: Dalton transactions, 2013, vol. 42, n° 34, p. 12157. doi: 10.1039/c3dt51216a https://archive-ouverte.unige.ch/unige:29225

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Deposited on : 2013-08-12

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