席夫碱2-[(2-呋喃亚甲基)氨基]苯甲酸对过渡金属的光谱、热、荧光及抗菌活性研究

O. Ali, S. M. El‐Medani, A. S. Sayed
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引用次数: 1

摘要

希夫碱被认为是一类非常重要的有机化合物,因为它们能够在各种氧化态下与许多不同的过渡金属离子形成稳定的配合物[1-10]。这些配合物在生物学[11-20]、催化活性[21-22]和荧光性质等方面有着广泛的应用。最近研究了几种希夫碱作为酸性介质中各种金属和合金的缓蚀剂[24,25]。席夫碱对腐蚀的抑制作用可归因于其分子中含有-C = n基团的π电子和芳环的π电子。偶联的大p键,通过它的分子很可能被强吸附在金属表面。镧系配合物的配位数在6 ~ 12之间,8和9是最常见的配位数。镧系元素是弱路易斯酸,最好与氧等硬路易斯碱配合。本文报道了Cu(II)、Ni(II)、Co(II)、Zn(II)、Hg(II)、Fe(III)、La(III)和Sm(III)金属离子的8种席夫碱配合物的合成。通过元素分析、固体反射率、FT-IR和荧光光谱、热分析和摩尔电导对配合物进行了表征。同时,研究了化合物对不锈钢410 (SS410)在h2so41m溶液中的缓蚀作用。
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Spectroscopic, Thermal, Fluorescence Studies and Antibacterial Activity of Some Transition Metals with Schiff Base 2-[(2- Furylmethylene) Amino] Benzoic Acid
Schiff bases are considered as a very important class of organic compounds because of their ability to form stable complexes with many different transition metal ions in various oxidation states [1-10]. These complexes have wide applications in some biological aspects [11-20], catalytic activity [21-22] and fluorescence properties [23]. Several Schiff bases have recently been investigated as corrosion inhibitors for various metals and alloys in acid media [24, 25]. The inhibition of corrosion by Schiff bases can be attributed to its molecules with π-electrons of –C=Ngroups and π-electrons of aromatic ring. Conjugating large p bond through which its molecules are likely to be adsorbed strongly on the metal surface. Coordination numbers of lanthanide complexes are in range from six to twelve, eight and nine being the most common coordination numbers. Lanthanides are weak Lewis acids and preferably coordinate to hard Lewis bases like oxygen. In this paper, we report synthesis of eight Schiff base complexes of Cu(II), Ni(II), Co(II), Zn(II), Hg(II), Fe(III), La(III) and Sm(III)metal ions. The complexes were characterized by elemental analysis, solid reflectance, FT-IR and fluorescence spectroscopy, thermal analysis and molar conductance. Also, the inhibition effects of the studied compounds on the corrosion of stainless steel 410 (SS410) in H2SO4 1M solutions were investigated.
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