The fast peroxyoxalate-chemiluminescence of 3-1-aza-4,10-dithia-7-oxacyclododecane as a novel fluorophore

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• 作者：Kiomars Zargoosh^a ; ^{Kiomarszargoosh@yahoo.com} ; Mojtaba Shamsipur^b ; ^{mshamsipur@yahoo.com} ; Morteza Hosseini^c ; Claudia Caltagirone^d ; Vito Lippolis^d
• 关键词：Peroxyoxalate ; Chemiluminescence ; Fast reaction ; Imidazole ; TCPO
• 刊名：Journal of Luminescence
• 出版年：2012
• 期刊代码：54_00222313
• 类别：ch
• 出版时间：August, 2012
• 卷：132
• 期：8
• 页码：2126-2129
• 文件大小：234 K

摘要

Due to their multiple selectivities, high sensitivity, and instrumental simplicity peroxyoxalate chemiluminescence (PO-CL) reactions have been used as powerful detection systems in several separation techniques. However many of the PO-CL reactions have slow kinetics and impose extra flow elements in separation systems to obtain acceptable band resolution, overcome the peak broadening and observe the reaction in a reasonable time window at maximum emission intensity. Therefore slow chemiluminescence reactions cannot be used in constructing miniaturized separation systems. To achieve the fast and intense PO-CL reactions (suitable for miniaturized separation systems) careful selection of the fluorophore molecule and the reaction conditions is of great importance. In this work, the time-dependent light emission of the fast chemiluminescence (CL) arising from the reaction of bis(2,4,6-trichlorophenyl)oxalate (TCPO) with H₂O₂ in the presence of 3-1-aza-4,10-dithia-7-oxacyclododecane (L) as a novel fluorophore, and imidazole as catalyst, has been studied in ethyl acetate solution. To find the best time-intensity emission curves the concentration of TCPO, imidazole, hydrogen peroxide and L were optimized. The maximum CL intensity and minimum reaction time were obtained at the concentration of 0.2 M H₂O₂, 2.0脳10^鈭? M TCPO, 1.0脳10^鈭? M fluorophore and 5.0脳10^鈭? imidazole. Under the optimum experimental condition, the entire CL reaction is completed in less than 3 s.