School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
Department of Chemistry, Kurukshetra University, Kurukshetra 136119, India.
Sci Total Environ. 2022 Nov 1;845:157242. doi: 10.1016/j.scitotenv.2022.157242. Epub 2022 Jul 9.
Metal cations are present in domestic and industrial wastewater and have adverse effects on human and aqueous life. The present study describes the development of the molecular probe 9-anthracen-9-ylmethylene)hydrazineylidene)methyl)-2,3,6,7-tetrahydro-1H,5H-pyrido[3,2,1-ij]quinolin-8-ol (AMHMPQ) to detect Cr, Cu, Fe, and Gd ions by using UV-visible, fluorescence, colorimetric and excitation-emission matrix (EEM) spectroscopy techniques. The interaction of Cr, Cu, Fe, and Gd can be observed by the absorption maxima shift, turn-off, colour changes, and EEM shifts. In addition, fluorescence limits of detection 17.66 × 10 M, 6.44 × 10 M, 28.87 × 10 M, and 12.49 × 10 M in wide linear ranges, low limits of quantifications, high values of Stern-Volmer constant, Job's plot and Benesi-Hildebrand plot justify the 1:1 association affinity with association constants of 1.46 × 10 M, 1.86 × 10 M, 2.69 × 10 M, 2.13 × 10 M for AMHMPQ-metal ions (Cr, Cu, Fe, and Gd ions), respectively. Paper- and mask-based kits are developed to explore the utility of the designed chemosensor. Additionally, AMHMPQ acts as a reusable sensor for two, seven, two, and zero cycles for Cr, Cu, Fe, and Gd ions, respectively, when checked with EDTA.
金属阳离子存在于家庭和工业废水中，对人类和水生生物有不良影响。本研究描述了分子探针 9-蒽-9-亚甲基）肼基）亚甲基）-2,3,6,7-四氢-1H,5H-吡啶并[3,2,1-ij]喹啉-8-醇（AMHMPQ）的开发，用于通过紫外-可见、荧光、比色和激发-发射矩阵（EEM）光谱技术检测 Cr、Cu、Fe 和 Gd 离子。Cr、Cu、Fe 和 Gd 的相互作用可以通过吸收最大值的位移、关闭、颜色变化和 EEM 位移来观察。此外，荧光检测限为 17.66×10 M、6.44×10 M、28.87×10 M 和 12.49×10 M，线性范围宽，检出限低，Stern-Volmer 常数、Job 图和 Benesi-Hildebrand 图的值高，证明了 1:1 的缔合亲和力，缔合常数分别为 1.46×10 M、1.86×10 M、2.69×10 M、2.13×10 M。开发了基于纸张和掩模的试剂盒，以探索设计的化学传感器的实用性。此外，当用 EDTA 检查时，AMHMPQ 分别作为 Cr、Cu、Fe 和 Gd 离子的可重复使用传感器，其循环次数分别为 2、7、2 和 0。
