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Article Dans Une Revue Angewandte Chemie Année : 2014

Supramolecular Luminescent Lanthanide Dimers for Fluoride Sequestering and Sensing

Olivier Jeannin
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Franck Camerel
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Résumé

Lanthanide complexes (Ln=Eu, Tb, and Yb) that are based on a C2-symmetric cyclen scaffold were prepared and characterized. The addition of fluoride anions to aqueous solutions of the complexes resulted in the formation of dinuclear supramolecular compounds in which the anion is confined into the cavity that is formed by the two complexes. The supramolecular assembly process was monitored by UV/Vis absorption, luminescence, and NMR spectroscopy and high-resolution mass spectrometry. The X-ray crystal structure of the europium dimer revealed that the architecture of the scaffold is stabilized by synergistic effects of the Eu[BOND]F[BOND]Eu bridging motive, π stacking interactions, and a four-component hydrogen-bonding network, which control the assembly of the two [EuL] entities around the fluoride ion. The strong association in water allowed for the luminescence sensing of fluoride down to a detection limit of 24 nM.

Dates et versions

hal-01151723 , version 1 (13-05-2015)

Identifiants

Citer

Hong Tao Liu, Aline M. Nonat, Maryline Beyler, Martin Regueiro-Figueroa, Katia Nchimi Nono, et al.. Supramolecular Luminescent Lanthanide Dimers for Fluoride Sequestering and Sensing. Angewandte Chemie, 2014, 53 (28), pp.7259-7263. ⟨10.1002/anie.201404847⟩. ⟨hal-01151723⟩
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