Chandra Rukmani, Manna Amit Kumar, Rout Kalyani, Mondal Jahangir, Patra Goutam K
Department of Chemistry, Guru Ghasidas Vishwavidyalaya Bilaspur CG India
RSC Adv. 2018 Oct 23;8(63):35946-35958. doi: 10.1039/c8ra07041e. eCollection 2018 Oct 22.
A simple and low cost multifunctional colorimetric receptor L has been designed, synthesized and characterized by H-NMR, IR spectroscopy, ESI-MS spectrometry and elemental analysis. The chemosensor L can selectively detect three biologically and environmentally important trivalent metal ions (Al, Feand Cr) both visually and spectrophotometrically in CHCN-HO (1 : 1, v/v) solution in the presence of other biologically relevant metal ions. The Job's plot analyses indicate the 2 : 2 binding stereochemistry for Al, Fe and Cr ions with L, which was further confirmed by H-NMR and ESI-MS studies. The binding constant values were found to be 2.9 × 10 M for Al, 1.079 × 10 M for Fe and 1.366 × 10 M for Cr respectively. The detections limits of the sensor for Al (2.8 × 10 M), Fe (1.9 × 10 M) and Cr (2.5 × 10 M) are far below than the limit set by the World Health Organization (WHO) for drinking water. Moreover, colorimetric test kits for rapid detection of Al, Fe, and Cr could be successively applied for all practical purposes, indicating its potential use in environmental samples. It has also been used in building molecular logic gates.
一种简单且低成本的多功能比色受体L已被设计、合成，并通过氢核磁共振（H-NMR）、红外光谱（IR）、电喷雾电离质谱（ESI-MS）和元素分析进行了表征。化学传感器L能够在存在其他生物相关金属离子的情况下，于乙腈-水（1∶1，v/v）溶液中通过视觉和分光光度法选择性地检测三种对生物和环境重要的三价金属离子（铝、铁和铬）。乔布氏曲线分析表明铝、铁和铬离子与L形成2∶2的结合立体化学结构，这通过氢核磁共振和电喷雾电离质谱研究得到了进一步证实。发现其与铝的结合常数为2.9×10⁵M，与铁的为1.079×10⁵M，与铬的为1.366×10⁵M。该传感器对铝（2.8×10⁻⁷M）、铁（1.9×10⁻⁷M）和铬（2.5×10⁻⁷M）的检测限远低于世界卫生组织（WHO）规定的饮用水限值。此外，用于快速检测铝、铁和铬的比色测试试剂盒可成功用于所有实际用途，表明其在环境样品中的潜在用途。它还被用于构建分子逻辑门。
