4-(dicyanomethylene)-2-methyl-6-[p-(dimethylamino)-styryl]-4H-pyran (DCMS) as a colorimetric fluorescent chemodosimeter for Cu2+ was synthesized. DCMS can selectively recognize Cu2+ without disturbance by other metal ions in acetonitrile. Furthermore, the DCMS solution showed a distinguishable color change visible to the naked eye after addition of Cu2+. DCMS for Cu2+ sensing in acetonitrile had a remarkably low detection limit of 0.2 μM, which is 1 % of the toxicity level in drinking water defined by the US Environment Protection Agency (USEPA). Interestingly, the results suggest that the Cu2+ sensing mechanism may be involved in a redox reaction between Cu2+ and DCMS.
Research on Chemical Intermediates – Springer Journals
Published: Apr 19, 2015
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