The present work reports the interaction of various vitamin B₆ cofactors with the red emitting glutathione stabilized copper nanoclusters (GSH-CuNCs). Addition of pyridoxamine (PM) resulted a new turn-on band at 410 nm due to the possible adsorption over the surface of GSH-CuNCs. The nano-assembly PM-GSH-CuNCs was applied for the selective detection of nitro-aromatic compounds. Upon addition of picric acid (PA), the fluorescence of PM-GSH-CuNCs was selectively quenched at 410 nm and ~ 625 nm among the other tested nitro-aromatic compounds. With a linearity range from 9.9 μM to 43 μM, the concentration of PA can be detected down to 2.74 μM. The high selectivity exhibited by the nano-assembly allows to detect PA in real samples like tap water, river water and matchstick. Advantageously, the nano-assembly PM-GSH-CuNCs was chemically adsorbed over the cellulosic strips and applied for the naked-eye detection of PA down to 1 μM.

本工作报告了各种维生素B ₆的相互作用与红色发光的谷胱甘肽稳定的铜纳米簇（GSH-CuNCs）的辅助因子。由于在GSH-CuNCs表面可能存在吸附，因此添加吡ido胺（PM）在410 nm处产生了一个新的导带。纳米组装的PM-GSH-CuNCs用于选择性检测硝基芳香族化合物。加入苦味酸（PA）后，在其他测试的硝基芳族化合物中，PM-GSH-CuNCs的荧光在410 nm和〜625 nm处选择性淬灭。线性范围为9.9μM至43μM，可以检测到低至2.74μM的PA浓度。纳米组件具有很高的选择性，可以检测自来水，河水和火柴等真实样品中的PA。有利地，