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Updated: Feb 6, 2026

Detecting the Water-soluble Chloride Distribution of Cement Paste in a High-precision Way
Published on: November 21, 2017
Design of water-soluble lanthanide luminescent probes for the selective detection of HOCl
Lucile Bridou1, Adam Nhari2,3, Loeza Collobert4
1CNRS UMR 5182, Laboratoire de Chimie, Univ Lyon, ENS de Lyon, F-69007 Lyon, France. olivier.maury@ens-lyon.fr.
Abstract:
The synthesis and photophysical properties of tacn- or pyclen-based macrocyclic complexes featuring extended thioanisole-picolinate antennas are reported. These systems efficiently sensitize Eu(III) luminescence, whereas Tb(III) emission is quenched due to back-energy transfer (BET). In all lanthanide-containing complexes (Eu, Tb and Gd), the sulfide donor group was readily oxidized by HOCl to the corresponding sulfoxide or sulfone. Upon oxidation, the Tb(III) complexes became highly luminescent and act as OFF-ON probes when excited at the isosbestic point (302 nm). Finally, a water/buffer soluble Tb(III) complex combining ether and sulfide antenna was prepared, exhibiting remarkable sensitivity and selectivity towards HOCl detection.
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