Synthesis, Coordination behavior, pH-titration and Antimicrobial Activity Studies of Ternary Co(II) Complexes of Girard T and Glycine Oligopeptides

Reda A. Ammar; Sameerah I. Al-Saeedi; Abdel-Nasser M. A. Alaghaz

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Synthesis, Coordination behavior, pH-titration and Antimicrobial Activity Studies of Ternary Co(II) Complexes of Girard T and Glycine Oligopeptides

机译：Girard T和甘氨酸寡肽三元Co（II）配合物的合成，配位行为，pH滴定和抗菌活性研究

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The new synthesized compounds were characterized using; spectral (mass, IR, UV–Vis, XRD) and analytical (elemental, molar conductance and magnetic moment measurements) tools. The geometrical structures of Co(II) complexes were found to be in tetrahedral configuration. SEM/EDX/TEM images showed nano-sized particles and identical distribution over the complex surface. The catalytic activities of the divalent cobalt complexes have been studied in the oxidation of cyclohexane, using environmental friendly oxidant, hydrogen peroxide. Complex with rough surface has shown higher catalytic activity compared to the other complexes. The antibacterial activity of these complexes has been evaluated. Potentiometric titration technique has been used to determination of stability constants of Co (II) with girard T (GT) and glycine oligopeptides (L) complexes in aqueous solutions at 25 °C and 0.1M ionic strength. The ternary complexes of Co(II) are formed by stepwise mechanism and the concentration distribution of the complexes is evaluated.

机译：使用以下方法对新合成的化合物进行了表征：光谱（质量，IR，UV-Vis，XRD）和分析（元素，摩尔电导和磁矩测量）工具。发现Co（II）配合物的几何结构为四面体构型。 SEM / EDX / TEM图像显示出纳米级颗粒，在复杂表面上的分布相同。已经使用环境友好的氧化剂过氧化氢研究了二价钴配合物在环己烷氧化中的催化活性。与其他配合物相比，具有粗糙表面的配合物显示出更高的催化活性。已经评估了这些复合物的抗菌活性。在25°C和0.1M离子强度下，电位滴定技术已被用于测定Co（II）与吉拉德T（GT）和甘氨酸寡肽（L）配合物在水溶液中的稳定性常数。 Co（II）的三元络合物通过逐步机理形成，并评估了络合物的浓度分布。

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《International Journal of Electrochemical Science》 |2018年第4期|共19页
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Reda A. Ammar; Sameerah I. Al-Saeedi; Abdel-Nasser M. A. Alaghaz;
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Synthesis, Coordination behavior, pH-titration and Antimicrobial Activity Studies of Ternary Co(II) Complexes of Girard T and Glycine Oligopeptides

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