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A selective lead sensor based on a fluorescent molecular probe grafted on a PDMS microfluidic chip

D. Faye, J. P. Lefevre, J. A. Delaire and I. Leray Journal of Photochemistry and Photobiology A-Chemistry, 2012, 234, 115-122

A calixarene bearing three dansyl groups and one long alkyl chain terminated by an alcohol function (Calix-DANS3-OH) has been synthesised. The photophysical and complexing properties of this new molecular fluorescent sensor are reported and show that Calix-DANS3-OH is able to selectively detect lead ion. In order to develop a portable sensor, calix-DANS3-OH was grafted on the wall of a PDMS microfluidic device. A fluorescence quenching has been observed upon Pb2+ complexation leading to detect low amounts of Pb2+. A detection limit of 2 x 10(-7) mol L-1 (42 ppb) has been determined. (c) 2012 Elsevier B.V. All rights reserved.

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Publication

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Paru le 3 février 2012

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doi10.1016/j.jphotochem.2012.01.006