荧光传感器的设计和开发旨在检测和定量环境中的痕量有毒过渡金属离子,生物,和水生样本得到了诊断和测试实验室的极大关注,出于减轻与这些污染物相关的健康风险的必要性。在这种情况下,我们介绍了杂环对称席夫碱衍生物用于荧光和显色检测Co2的用途,Cu2+和Hg2+离子。配体的表征涉及一系列全面的技术,包括身体评估,光学分析,NMR,FT-IR,和质谱检查。通过利用光物理参数和FT-IR光谱分析阐明了配体-金属络合的机理,在配体和金属盐溶液之间的相互作用之前和之后。在吸收和荧光光谱中观察到的明显变化,随着独特的显色变化,用Co2+治疗后,Cu2+和Hg2+,确认配体和处理过的金属离子之间成功形成络合物。值得注意的是,受体的络合反应表现出对Co(II)的选择性,Cu(II),和汞(II),没有观察到显色变化,光谱变化,或各种测试的金属离子的带移,包括Na+,Ag+,Ni2+,Mn2+,Pd2+,Pb2+,Cd2+,Zn2+,Sn2+,Fe2+,Fe3+,Cr3+和Al3+。这些金属离子和配体之间不存在相互作用可归因于它们与配体的结构组合物络合的紧密或不充分有益的导带。为了量化传感器的功效,荧光滴定光谱用于确定Co2+的检测限,Cu2+和Hg2+,产量值为2.92×10-8、8.91×10-8和4.39×10-3M,分别。Benesi-Hildebrand图提供了配体-钴的缔合常数值,配体-铜,和配体-汞络合物分别为0.74、2.52和13.89M-1。
The design and development of a fluorescence sensor aimed at detecting and quantifying trace amounts of toxic transition metal ions within environmental, biological, and aquatic samples has garnered significant attention from diagnostic and testing laboratories, driven by the imperative to mitigate the health risks associated with these contaminants. In this context, we present the utilization of a heterocyclic symmetrical Schiff Base derivative for the purpose of fluorogenic and chromogenic detection of Co2+, Cu2+ and Hg2+ ions. The characterization of the ligand involved a comprehensive array of techniques, including physical assessments, optical analyses, NMR, FT-IR, and mass spectrometric examinations. The mechanism of ligand-metal complexation was elucidated through the utilization of photophysical parameters and FT-IR spectroscopic analysis, both before and after the interaction between the ligand and the metal salt solution. The pronounced alterations observed in absorption and fluorescence spectra, along with the distinctive chromogenic changes, following treatment with Co2+, Cu2+ and Hg2+, affirm the successful formation of complexes between the ligands and the treated metal ions. Notably, the receptor\'s complexation response exhibited selectivity towards Co(II), Cu(II), and Hg(II), with no observed chromogenic changes, spectral variations, or band shifts for the various tested metal ions, including Na+, Ag+, Ni2+, Mn2+, Pd2+, Pb2+, Cd2+, Zn2+, Sn2+, Fe2+, Fe3+, Cr3+ and Al3+. This absence of interaction between these metal ions and the ligand could be attributed to their compact or inadequately conducive conduction bands for complexation with the ligand\'s structural composition. To quantify the sensor\'s efficacy, fluorescence titration spectra were employed to determine the detection limits for Co2+, Cu2+ and Hg2+, yielding values of 2.92 × 10-8, 8.91 × 10-8, and 4.39 × 10-3 M, respectively. The Benesi-Hildebrand plots provided association constant values for the ligand-cobalt, ligand-copper, and ligand-mercury complexes as 0.74, 2.52, and 13.89 M-1, respectively.