Quenching effect of some heavy metal ions on the fast peroxyoxalate-chemiluminescence of 1-(dansylamidopropyl)-1-aza-4,7,10-trithiacyclododecane as a novel fluorophore

The fast chemiluminescence (CL) arising from the reaction of bis(2,4,6-trichlorophenyl)oxalate (TCPO) with hydrogen peroxide in the presence of 1-(dansylamidopropyl)-1-aza-4,7,10-trithiacyclododecane (L) as a novel fluorophore, and imidazole as catalyst, has been studied in ethyl acetate solution. The relationships between the chemiluminescence intensity and concentrations of TCPO, imidazole, hydrogen peroxide and L are reported. In the presence of imidazole as catalyst, the entire CL signal was completed in less than 3 s. The quenching effect of Cu2+, Pb2+, Cd2+, Hg2+ and Ag+ ions on the chemiluminescent systemwas investigated, the resulting Stern–Volmer plotswere obtained and the KQ valueswere calculated. Itwas found that the quenching effect of metal ions on the chemiluminescence of L decreases in the order Cu2+ >Pb2+ >Cd2+ >Hg2+ >Ag+.