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Fluorescent nanoparticles as selective Cu(ii) sensors

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Abstract

Latex nanoparticles functionalized with cyclam (1,4,8,11-tetraazacyclotetradecane), a copper chelator, have been doped with a fluorescent dye 1 (BODIPY derivative: 4,4-difluoro-8-(2′,4′,6′-trimethyl)phenyl-2,6-diethyl-1,3,5,7-tetramethyl-4-bora-3a,4a-diaza-s-indacene). The bulky, hydrophobic fluorophore 1 dissolves within the nanoparticles’ polymer core up to a concentration of about 88.4 ώmol g−1. At this concentration the fluorescence yield is about 0.80. Adding Cu2+ ions to the solution decreases the fluorescence because of the energy transfer between the dye and the violet copper cyclam complexes. The response is fast: 90% of the quenching occurs within 1 s. The Cu2+ detection threshold is of 1 nanomolar. No interferences were observed with zinc and nickel ions.

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  1. Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires, CNRS UMR 8531, Ecole Normale Supérieure de Cachan, 61 avenue du Président Wilson, 94235, Cachan Cedex, France

    Rachel Méallet-Renault, Alexandre Hérault & Jean-Jacques Vachon

  2. SIRCOB UMR CNRS 8086, Université Versailles Saint-Quentin en Yvelines, 45 avenue des Etats-Unis, 78035, Versailles Cedex, France

    Robert B. Pansu, Sonia Amigoni-Gerbier & Chantal Larpent

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  1. Rachel Méallet-Renault
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  2. Alexandre Hérault
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Correspondence to Rachel Méallet-Renault.

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Electronic supplementary information (ESI) available: Fig. S1 and S2. See DOI: 10.1039/b513215k

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Méallet-Renault, R., Hérault, A., Vachon, JJ. et al. Fluorescent nanoparticles as selective Cu(ii) sensors. Photochem Photobiol Sci 5, 300–310 (2006). https://doi.org/10.1039/b513215k

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