1-{(Z)-[(2-羟基苯基)亚胺]甲基萘-2-醇类Mn (II)和Co (II)配合物的合成、表征及在1M HCl溶液中的缓蚀研究

A. Haruna, M. M. Rumah, U. Sani, A. Ibrahim
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引用次数: 2

摘要

本文合成了由2-氨基苯酚和2-羟基-1-萘醛及其Co (II)和Mn (II)配合物合成的希夫碱,并用溶解度、熔点/分解温度、摩尔电导、红外光谱和磁化率对其进行了表征。用Job的连续变分法确定了金属离子配位体的数目。它们的摩尔电导值表明所有配合物都是非电解质。配合物的磁矩值表明,Mn (II)和Co (II)均具有顺磁性。金属配合物的光谱数据表明,金属离子与亚甲基氮和去质子化氧原子络合。用失重法评价了希夫碱和Mn (II)、Co (II)配合物在0.1MHCl铜金属溶液中的缓蚀作用。抑制效果随抑制剂浓度的增加而增加。吸附的Gibb自由能为负值(ΔGads)证实了抑制过程的自发性和物理吸附性,这与Langmuir吸附等温线不一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis, Characterization and corrosion Inhibition Studies on Mn (II) and Co (II) Complexes Derived from 1-{(Z)-[(2-hydroxyphenyl) imino]methyl}naphthalen-2-ol in 1M HCl Solution
Schiff base derived from the reaction of 2-amino phenol and 2-hydroxy-1-naphthaldehyde and its Co (II), and Mn (II) complexes have been synthesized and characterized by solubility test, melting point/ decomposition temperatures, molar conductance, IR and magnetic susceptibility. The number of ligands coordinated to the metal ion was determined using Job’s method of continuous variation. Their molar conductance values indicate that all the complexes are non-electrolytes. Magnetic moment values of the complexes showed that both Mn (II) and Co (II) are paramagnetic. The spectroscopic data of metal complexes indicated that the metal ions are complexed with azomethine nitrogen and deprotonated oxygen atom. Corrosion inhibition of the schiff base and Mn (II) and Co (II) complexes were evaluated using the weight loss method in a 0.1MHCl solution for copper metal. The inhibition efficiency increased with increasing inhibitors concentration. The negative values of Gibb’s free energy of adsorption (ΔGads) confirmed the spontaneity and physical adsorption of the inhibition process which is inconsistent with Langmuir adsorption isotherm.
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