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Article Dans Une Revue Inorganic Chemistry Année : 2021

Ratiometric luminescence detection of copper(I) by a resonant system comprising two antenna/lanthanide pairs

Résumé

Selective and sensitive detection of Cu(I) is an ongoing challenge due to its important role in biological systems, for example. Herein, we describe a photoluminescent molecular chemosensor integrating two lanthanide ions (Tb$^{3+}$ and Eu$^{3+}$) and respective tryptophan and naphthalene antennas onto a polypeptide backbone. The latter was structurally inspired from copper-regulating biomacromolecules in Gram-negative bacteria and was found to bind Cu$^+$ effectively under pseudobiological conditions (log K$_{Cu}$$^+$ = 9.7 ± 0.2). Ion regulated modulation of lanthanide luminescence in terms of intensity and long, millisecond lifetime offers perspectives in terms of ratiometric and time-gated detection of Cu$^+$. The role of the bound ion in determining the photophysical properties is discussed with the aid of additional model compounds.
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hal-03483636 , version 1 (10-10-2022)

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Céline Cepeda, Sergey A. Denisov, Didier Boturyn, Nathan D. Mcclenaghan, Olivier Sénèque. Ratiometric luminescence detection of copper(I) by a resonant system comprising two antenna/lanthanide pairs. Inorganic Chemistry, 2021, 60 (23), pp.17426-17434. ⟨10.1021/acs.inorgchem.1c02985⟩. ⟨hal-03483636⟩
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