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Proceedings Paper

Selective detection of heavy metal ions by calixarene-based fluorescent molecular sensors
Author(s): Haitao Zhang; Djibril Faye; Han Zhang; Jean-Pierre Lefevre; J. A. Delaire; Isabelle Leray
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Paper Abstract

The synthesis, spectroscopic characterization and complexing properties of calixarene-based fluorescent sensors are reported. The calixarene bearing four dansyl fluorophores (Calix-DANS4) exhibits a very high affinity for the detection of lead. A fluorimetric micro-device based on the use of a Y-shape microchannel was developed and allows lead detection with a 5 ppb detection limit. For mercury detection, a fluorescent molecular sensor containing a calixarene anchored with four 8-quinolinoloxy groups (Calix-Q) has been synthesized. The absorption and fluorescence spectra of this sensor are sensitive to the presence of metal cations. An efficient fluorescence quenching is observed upon mercury complexation because of a photoinduced electron transfer from the fluorophore to the bound mercury. Calix-Q shows a high selectivity towards Hg2+ over interfering cations (Na+, K+, Ca2+, Cu2+, Zn2+, Cd2+ and Pb2+) and a 70 ppb sensitivity.

Paper Details

Date Published: 9 May 2012
PDF: 7 pages
Proc. SPIE 8366, Advanced Environmental, Chemical, and Biological Sensing Technologies IX, 83660I (9 May 2012); doi: 10.1117/12.919360
Show Author Affiliations
Haitao Zhang, Ecole Normale Supérieure de Cachan (France)
Djibril Faye, Ecole Normale Supérieure de Cachan (France)
Han Zhang, Ecole Normale Supérieure de Cachan (France)
Jean-Pierre Lefevre, Ecole Normale Supérieure de Cachan (France)
J. A. Delaire, Ecole Normale Supérieure de Cachan (France)
Isabelle Leray, Ecole Normale Supérieure de Cachan (France)


Published in SPIE Proceedings Vol. 8366:
Advanced Environmental, Chemical, and Biological Sensing Technologies IX
Tuan Vo-Dinh; Robert A. Lieberman; Günter Gauglitz, Editor(s)

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