源自天然席夫碱的过渡金属配合物在分光光度法测天然水中的Fe(Ⅲ)的应用(英文)

Transition Metal Complexes Derived from Natural Schiff Bases for Determination of Fe(Ⅲ) Spectrophotometrically in Natural Water

描述了一种新颖、简便的合成含五齿配位基的大环席夫碱配体的方法,制备和表征了该席夫碱的1∶1包合物。用化学和光谱学方法测定了标题配合物的组成,认为在所有配合物中配位金属原子取八面体结构。数据表明:配体起O2N4六齿结构而每个环绕金属原子在八面体环境中。配合物的红外和1H NMR光谱符合中心金属原子的配位结果。用分光光度法测定了配合物的稳定常数。用共轭余量法(CR method)计算了在热分解的不同阶段配合物活化的动力学和热力学参数。此外,用抑菌圈直径法筛选了配体及其金属配合物抑制细菌和真菌的能力。用回收率试验研究了天然螯合配体在不同天然水体中对Fe(Ⅲ)离子配合作用的影响。

A novel, simple approach to the synthesis of macrocyclic Schiff base ligand bearing pendent coordinating groups is described and its 1：1 inclusion complexes are prepared and characterized. The composition of the title material was determined by the chemical and spectroscopic methods and the surrounding of metal with the octahedral structure for the all complexes was suggested. The data reveal that the ligand acts as 02N4 hexadentate structure with each metal atom in an octahedral environment. Infrared and 1HNMR spectra of the complexes agree with the coordination to the central metal atom. The stability constants of the complexes are calculated spectrophotometrieally. The activation kinetic and thermodynamic parameters are calculated in different stages of thermal decomposition using the conjugate residual method （CR method）. Moreover, the ligand and its metal complexes are screened against bacteria and fungi using the inhibitory zone diameter. The effect of a neutral chelating ligand on the complexation with iron in different types of natural water was studied by using recovery test.