Dual-emission copper nanoclusters for hydrogen sulfide detection: a novel approach†

IF 2.7 3区化学 Q2 CHEMISTRY, ANALYTICAL

Analytical Methods Pub Date : 2025-04-17 DOI:10.1039/D5AY00487J

Longyan Wang, Huachao Che, Lizhu Fang, Liqiang Lu, Xike Tian and Yeukuang Hwu

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Abstract

Dual-emission copper nanoclusters (CuNCs) were synthesized via a novel, green and one-pot aqueous method, employing bovine serum albumin and glutathione as reducing and stabilizing agents, respectively. The CuNCs exhibited distinct fluorescence emissions at 443 nm and 612 nm under 365 nm excitation. Notably, with the increase in hydrogen sulfide concentration, the dual-emission fluorescence of CuNCs was gradually quenched, and complete quenching occurred at 280 μM. The probe demonstrated a stable response to hydrogen sulfide within the concentration range of 2.5–60.0 μM. The detection limit of hydrogen sulfide was as low as 0.32 μM, which is significantly lower than the limit set by the World Health Organization (1.5 μM). This method was successfully applied for the detection of sulfide in environmental samples, achieving remarkable recovery rates ranging from 98.2–102%. Moreover, the response mechanism and practical application potential of CuNCs as a hydrogen sulfide detection platform were investigated, offering crucial insights for the study of fluorescence properties of metal nanoclusters and the prevention and control of hydrogen sulfide pollution.

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双发射铜纳米簇用于硫化氢检测：一种新方法

以牛血清白蛋白和谷胱甘肽为还原剂和稳定剂，采用绿色一锅水法制备了双发射铜纳米团簇。在365 nm激发下，CuNCs在443 nm和612 nm处有明显的荧光发射。值得注意的是，随着硫化氢浓度的增加，CuNCs的双发射荧光逐渐猝灭，在280 μM处发生完全猝灭。在2.5 ~ 60.0 μM的浓度范围内，探针对硫化氢有稳定的响应。硫化氢的检出限低至0.32 μM，明显低于世界卫生组织规定的限（1.5 μM）。该方法成功地应用于环境样品中硫化物的检测，回收率为98.2% ~ 102%。此外，还研究了CuNCs作为硫化氢检测平台的响应机制和实际应用潜力，为研究金属纳米团簇的荧光特性和防治硫化氢污染提供了重要的见解。

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