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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Facile and rapid synthesis of water-soluble fluorescein gold nanoclusters for sensitive and selective detection of Ag~+
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Facile and rapid synthesis of water-soluble fluorescein gold nanoclusters for sensitive and selective detection of Ag~+

机译：简便快速合成水溶性荧光素金纳米团簇，用于灵敏和选择性地检测Ag〜+

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摘要

We report a direct one-pot approach, employing tetrakis(hydroxymethyl)phosphonium chloride (THPC) and 11-mercaptoundecanoic acid (11-MUA) as combined reducing/capping agents, for the rapid preparation of fluorescent gold nanoclusters (AuNCs) from HAuCI4 in aqueous solution at room temperature. The as-prepared AuNCs exhibit a fluorescence emission at 535 nm, a quantum yield of 1.8% and average diameters of 2.0 ± 0.5 nm. The resultant MUA/THPC-AuNCs have been exploited, for the first time, for the highly sensitive and selective detection of silver ions (Ag~+) in aqueous solution when using EDTA as a masking agent for Hg~(2+). The fluorescence intensity quenches linearly within the range of 25 nM to 3 nM with high sensitivity (LOD = 9 nM, S/N = 3) and this sensing system has been applied for environmental water sample analysis.
机译：我们报告了一种直接一锅法，采用四（羟甲基）氯化chloride（THPC）和11-巯基十一酸（11-MUA）作为还原剂/加帽剂，用于从HAuCl4中快速制备荧光金纳米簇（AuNCs）。室温下的水溶液。所制备的AuNCs在535 nm处显示荧光发射，量子产率为1.8％，平均直径为2.0±0.5 nm。当使用EDTA作为Hg〜（2+）的掩蔽剂时，所得的MUA / THPC-AuNCs首次被用于高灵敏度和选择性地检测水溶液中的银离子（Ag〜+）。荧光强度在高灵敏度（LOD = 9 nM，S / N = 3）范围内在25 nM至3 nM范围内线性猝灭，该传感系统已用于环境水样分析。

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