Fluorescent metal nanoclusters (MNCs) have found extensive application in recognizing molecular species. Here, orange‐red fluorescent Arg–A. paniculata–MoNCs were synthesized using Andrographis paniculata leaf extract, arginine as a ligand, and MoCl5 as a metal precursor. The Arg–A. paniculata–MoNCs complex exhibited a quantum yield (QY) of 16.91% and excitation/emission wavelengths of 400/665 nm. The synthesized Arg–A. paniculata–MoNCs successfully acted as a probe for assaying neomycin sulphate (NS) via fluorescence turn‐off and K+ ions via fluorescence turn‐on mechanisms, respectively. Moreover, the developed probe was effectively used to develop a cellulose paper strip‐based sensor for detection of NS and K+ ions. Arg–A. paniculata–MoNCs demonstrated great potential for sensing NS and K+ ions, with concentration ranges of 0.1–80 and 0.25–110 μM for NS and K+ ions, respectively. The as‐synthesized Arg–A. paniculata–MoNCs efficiently detected NS and K+ ions in food and biofluid samples, respectively.

中文翻译：

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使用橙红色荧光钼纳米簇对硫酸新霉素和 K+ 离子进行荧光“关闭-开启”测定

荧光金属纳米簇（MNC）在识别分子种类方面有着广泛的应用。在这里，橙红色荧光 Arg–穗花蒿–MoNCs 的合成使用穿心莲叶提取物、精氨酸作为配体和 MoCl5作为金属前体。精氨酸——穗花蒿–MoNCs复合物的量子产率（QY）为16.91%，激发/发射波长为400/665 nm。合成的Arg——穗花蒿–MoNC 成功充当通过荧光关闭和 K 测定硫酸新霉素 (NS) 的探针+离子分别通过荧光开启机制。此外，所开发的探针有效地用于开发基于纤维素纸条的传感器，用于检测 NS 和 K+离子。精氨酸–穗花蒿–MoNCs 在传感 NS 和 K 方面表现出巨大的潜力+NS 和 K 的浓度范围为 0.1–80 和 0.25–110 μM+离子，分别。合成的 Arg–穗花蒿–MoNCs 有效检测 NS 和 K+分别是食品和生物流体样品中的离子。