Abstract
Conjugated polymer could be obtained by the polymerization of 4,7-diethynylbenzo[2,1,3]thiadiazole (M-1) with 1,4-diazidobenzene (M-2) via click reaction. The polymer shows strong blue-green fluorescence due to the extended π-electronic structure in the main chain backbone. The responsive optical properties of the polymer on various transition metal ions were investigated by fluorescence spectroscopy. Compared with other transition metal cations, such as Co²+, Hg²+, Ag+, Cd²+, Cu²+ and Zn²+, Ni²+ showed the most pronounced fluorescence response in the presence of the conjugated polymer. The results indicate this kind of polymer with benzo[2,1,3]thiadiazole and triazole units can be used as a selective fluorescence sensor for Ni²+ detection.
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