鉴于对反贩运措施的需求迅速增长,本文研究了用希夫碱络合物化学操纵的低成本高敏荧光探针的开发及其在硝基炸药检测中的前瞻性适用性。在这项研究中,使用席夫碱配体L=2-甲氧基-5-甲基-N-(2-吡啶-2-基亚甲基)苯胺在一锅中合成了一种新的Zn(II)金属配合物。还使用各种光谱工具彻底表征该络合物并进行单晶XRD分析。在非对称单元中,方形锥体锌(II)中心存在于配体L的内部N2O隔室中。分子间Cg···Cg相互作用存在于两个不同的不对称残留单元之间,导致沿b轴的超分子组装。通过关闭荧光响应,该复合物可用作检测CH3CN溶液中硝基芳烃的传感器。在研究溶液相的传感现象期间,已经报道了4-硝基苯甲酸的淬火常数(KSV)为1.8×104M-1的显着淬火效率。此外,确定化学传感器与NO2的结合化学计量和结合常数,荧光猝灭的机理也被假定。NO2的检出限为7.6×10-7M,结合常数k=1.1021×108M-1。此外,DFT计算使得根据实验结果更容易理解适当的结合过程。根据传感器在法医调查中的潜力,我们还设计了一种纸质传感器条,用于视觉检测硝基炸药残留物。
This paper scrutinises the development of low-cost hypersensitive fluorescent probes manipulated chemically with Schiff base complexes and their prospective applicability for the detection of nitro explosives in light of the rapidly expanding demand for anti-trafficking measures. In this study, a new Zn(II) metal complex has been synthesized in one pot using the Schiff base ligand L= 2-methoxy-5-methyl-N-(2-pyridin-2-ylmethylene) aniline. The complex was also thoroughly characterised using various spectroscopic tools and subjected to single crystal XRD analysis. In the asymmetric unit, square pyramidal zinc (II) centre exist in the inner N2O compartment of the ligand L. The intermolecular Cg···Cg interactions exist between two different asymmetric residual units lead to supramolecular assembly along b axis. By turning off the fluorescence response, the complex serves as a sensor for the detection of nitro aromatics in CH3CN solution. A significant quenching efficiency has been reported with a quenching constant (KSV) 1.8 × 104 M-1 for 4-nitrobenzoic acid during investigation of sensing phenomenon in solution phase. In addition, determining the binding stoichiometry of the chemosensor with NO2 and the binding constant, the mechanism of fluorescence quenching has also been postulated. The detection limit of NO2 is 7.6×10 -7 M, with the binding constant k = 1.1021× 108 M-1. Additionally, the DFT calculation makes it easier to comprehend the appropriate binding process in light of the findings of experiments. We also designed a paper sensor strip for the visual detection of Nitro Explosive Residues in light of the sensor\'s potential used in forensic investigations.