Arshad Muhammed, Williams Linda, Ajayan Athira, Joseph Abraham
Department of Chemistry, University of Calicut, Calicut University, P O-673 635, Malappuram, Kerala, India.
J Fluoresc. 2024 Aug 19. doi: 10.1007/s10895-024-03895-3.
A neoteric colorimetric probe based on 2-hydroxy-1-naphthaldehyde (PMB3) was designed and synthesized for the real-time as well as on-site naked-eye detection of Cu/Ni ions. Various physicochemical methods were employed to characterize the probe, and its colorimetric response to different metal ions was meticulously investigated. The probe, PMB3, exhibited a sensitive colorimetric response to Cu/Ni ions among other competing metal ions, culminating in a prominent colour change from colourless to yellow. The stoichiometry of the ligand metal complexes was ascertained to be in a 1:1 ratio using Job's plot analysis, which was further corroborated by ESI-MS data. With detection limits of 4.56 µM for Cu and 2.68 µM for Ni, the method was effectively extended to real sample analysis, ensuring propitious results that closely aligned with the actual values.
设计并合成了一种基于2-羟基-1-萘甲醛的新型比色探针（PMB3），用于实时和现场肉眼检测铜离子和镍离子。采用多种物理化学方法对该探针进行表征，并对其对不同金属离子的比色响应进行了细致研究。在其他竞争金属离子存在的情况下，探针PMB3对铜离子和镍离子表现出灵敏的比色响应，最终导致显著的颜色变化，从无色变为黄色。使用Job曲线分析确定配体金属配合物的化学计量比为1:1，电喷雾电离质谱（ESI-MS）数据进一步证实了这一结果。该方法对铜离子的检测限为4.56 μM，对镍离子的检测限为2.68 μM，并有效地扩展到实际样品分析，确保了与实际值紧密相符的良好结果。
