Young Researchers and Elite Club, Bushehr Branch, Islamic Azad University, Bushehr, Iran.
Department of Chemistry, Sharif University of Technology, Tehran, Iran; Universal Scientific Education and Research Network (USERN), Los Angeles, CA, USA.
Ultrason Sonochem. 2018 Mar;41:337-349. doi: 10.1016/j.ultsonch.2017.09.054. Epub 2017 Sep 30.
A novel high selective colorimetric chemosensor was introduced based on a nano diphenyl-based Schiff base (HL), 2,2'-((1E,1'E)-(((hexylazanediyl)bis(4,1-phenylene))bis(methanylylidene))bis(azanylylidene))bis(4-methylphenol) that synthesized using sonochemical method. HL was characterized by FT-IR, MS, TGA, H NMR, C NMR, SEM and elemental analysis techniques, then fabricated as the portable strips for sensing copper (II) ions in aqueous media. The binding interaction between HL and various metal ions was investigated by UV-Vis spectroscopic that showed favorable coordination toward Cu ion. HL exhibited binding-induced color changes from yellow to pink and practically no interference in the presence of other metal ions, i.e., Cr, Mn, Fe, Co, Ni, Zn, Cd, Hg, Pb, Mg and Ca. The chemsensor showd the color change from yellow to pink in presence of copper (II) ion in aqueous media due to binging of HL and Cu (II). This sensor can determine the copper (II) at in the rang of 7.5 × 10-1.8 × 10 mol L with a correlation equation: Absorbance = 0.0450[Cu] × 10 + 0.71 and R = 0.975 and low detection limit of 1.89 × 10 mol L. Density functional theory (DFT) calculations were carried out at the B3LYP levels of theory with B3LYP/6-311+G(d,p) and LANL2DZ/6-311+G(d,p) basis sets for chemosensor and its copper complex respectively. The optimized geometry, harmonic vibrational frequencies, H NMR and C NMR chemical, Molecular orbital (M.O.), Mulliken population analysis (MPA), contour of Electrostatic Potential (ESP) and Molecular Electrostatic Potential (MEP) map of HL were calculated which show good agreement with behavior of sensor for detection of Cu ion.
一种新型高选择性比色化学传感器，基于纳米二苯基希夫碱（HL），即 2,2'-((1E,1'E)-(((己基氮二基)双(4,1-亚苯基))双(亚甲亚基))双(氮亚基))双(4-甲基苯酚)，通过超声化学方法合成。HL 通过 FT-IR、MS、TGA、H NMR、C NMR、SEM 和元素分析技术进行了表征，然后制备成用于在水介质中感测铜（II）离子的便携式条状物。通过紫外可见光谱研究了 HL 与各种金属离子的结合相互作用，结果表明其对铜离子具有良好的配位作用。HL 表现出与铜离子结合诱导的颜色从黄色变为粉红色的变化，并且在存在其他金属离子时实际上没有干扰，例如 Cr、Mn、Fe、Co、Ni、Zn、Cd、Hg、Pb、Mg 和 Ca。该化学传感器在水介质中存在铜（II）离子时，由于 HL 和 Cu（II）的结合，颜色从黄色变为粉红色。该传感器可以在 7.5×10-1.8×10 mol L 的范围内测定铜（II），其相关方程为：吸光度=0.0450[Cu]×10+0.71，R=0.975，检测限低至 1.89×10 mol L。在 B3LYP 理论水平上，使用 B3LYP/6-311+G(d,p)和 LANL2DZ/6-311+G(d,p)基组分别对化学传感器及其铜配合物进行了密度泛函理论（DFT）计算。计算了 HL 的优化几何形状、谐波振动频率、H NMR 和 C NMR 化学、分子轨道（M.O.）、Mulliken 布居分析（MPA）、静电势（ESP）轮廓和分子静电势（MEP）图，这些结果与传感器对铜离子的检测行为吻合良好。
