Solution studies of tris(2-benzylaminoethyl)amine complexes of zinc(II) and copper(II): The catalytic hydrolysis of toxic organophosphate
作者:Gaber A.M. Mersal、Mohamed M. Ibrahim
DOI:10.1016/j.crci.2011.10.012
日期:2012.4
Résumé Solution studies of the tetradentate ligand tris(2-benzylaminoethyl)amine, BzTren with both zinc(II) and copper(II) salts were investigated in aqueous methanol (33% v/v) by means of 1H NMR, potentiometric, and UV-visible titrations as well as cyclic voltammetry. Subsequently, their zinc(II) and copper(II) complexes [BzTren-M(OH2)]2+ 1 and 2 (M2+ = Zn2+ and Cu2+) were synthesized and fully characterized by using FT-IR spectroscopy, elemental analysis, and thermal analysis. Complexes 1 and 2 are investigated kinetically for the catalytic hydrolysis of the toxic organophosphate parathion at 50 °C in aqueous methanol (33%, v/v). The kinetic results indicate that copper(II) complex 2 is more active than zinc(II) complex 1, presumably a reflection of the effective electron-withdrawing as well as the greatest electrophilicity of copper(II) ion. Supplementary Materials: Supplementary material for this article is supplied as a separate file: mmc1.doc
简历
研究四配位配体 tris(2-苄胺基乙基)胺 (BzTren) 与锌(II)和铜(II)盐在水-甲醇溶液 (33% 体积比) 中的配位反应,通过 1H NMR、电位滴定、紫外-可见光谱滴定以及循环伏安法进行了探讨。随后,合成了它们与锌(II)和铜(II)的配合物 [BzTren-M(OH2)]2+ 1 和 2 (M2+ = Zn2+ 和 Cu2+),并通过 FT-IR 光谱、元素分析和热分析完全表征了这些配合物。在 50 °C 的水-甲醇溶液 (33% 体积比) 中,对毒性有机磷酸酯对硫磷的催化水解动力学进行了研究。动力学结果表明,铜(II) 配合物 2 比锌(II) 配合物 1 更为活泼,这可能是由于铜(II) 离子有效吸电子能力和最大亲电性的反映。
补充材料:
本文的补充材料以单独文件形式提供:mmc1.doc