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Project supported by the National Natural Science Foundation of China (No. 20875078) and Chongqing Municipal Key Laboratory on Luminescence and Real-Time Analysis (No. CSTC 2006CA8006).
In pH 4.2-5.2 HOAc-NaOAc buffer solution, Ag+ reacted with dihalogenated fluorescein (DHF) dyes to form a 1 ; 2 anionic complex. This anionic complex could further react with hyoscine butylbromide (HBB) to form 1...