AbstractGold-silver nanoclusters (Au-AgNCs) were synthesized by simultaneous chemical reduction of Au(III) and Ag(I) ions in one pot, using bovine serum albumin as both a template and a reductant. The Au-AgNCs have an average size of 2.4 nm and display strong red fluorescence (with an emission peak at 610 nm on excitation at 360 nm). The fluorescence quantum yield can reach 18.6%. Fluorescence is strongly quenched by hypochlorite, while other common anions have minor (or no) effects on fluorescence. Based on these findings, a fluorometric method was developed for the determination of hypochlorite. The method has a linear response in the 0.7 to 15 μM concentration range, with a limit of detection as low as 80 nM. It was successfully applied to the determination of hypochlorite in (spiked) tap water. Graphical abstractGold-silver nanoclusters with strong red fluorescence were synthesized by simultaneous chemical reduction of Au(III) and Ag(I) ions in one pot, and a sensitive and selective method for the detection of hypochlorite was developed based on the quenching of the fluorescence of the nanoclusters.

中文翻译：

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具有强红色荧光的双金属纳米团簇可灵敏检测自来水中的次氯酸盐

摘要 以牛血清白蛋白为模板和还原剂，在同一锅中同时化学还原 Au(III) 和 Ag(I) 离子，合成了金银纳米团簇 (Au-AgNCs)。Au-AgNCs 的平均尺寸为 2.4 nm，并显示出强烈的红色荧光（在 360 nm 激发时发射峰位于 610 nm）。荧光量子产率可达18.6%。荧光被次氯酸盐强烈淬灭，而其他常见的阴离子对荧光的影响很小（或没有）。基于这些发现，开发了一种用于测定次氯酸盐的荧光法。该方法在 0.7 至 15 μM 浓度范围内具有线性响应，检测限低至 80 nM。成功应用于（加标）自来水中次氯酸盐的测定。