Complex conversion of the redox pair Co~Ⅲ-NO_2 to Co~Ⅱ-NO_3: Synthesis, crystal structure and DNA-binding of trans,trans,trans-[Co(py)_2(H_2O)_2(NO_3)_2]

Hassan Hadadzadeh; Mona Salimi; Matthias Weil; Mohammad Taghi Behnamfar; Farivash Darabi

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Complex conversion of the redox pair Co~Ⅲ-NO_2 to Co~Ⅱ-NO_3: Synthesis, crystal structure and DNA-binding of trans,trans,trans-[Co(py)_2(H_2O)_2(NO_3)_2]

机译：氧化还原对Co〜Ⅲ-NO_2向Co〜Ⅱ-NO_3的复杂转化：反式，反式，反式-[Co（py）_2（H_2O）_2（NO_3）_2]的合成，晶体结构和DNA结合

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The mononuclear Co(Ⅱ) complex trans,trans,trans-[Co(py)_2(H_2O)_2(NO_3)_2], where py is pyridine, has been prepared under atmospheric conditions via a redox reaction of the starting material, Na3[Co(NO_2)_6]. The product has been characterized by elemental analysis, spectroscopic methods (UV-Vis and IR) and single-crystal X-ray structure analysis. The Co(Ⅱ) atom is six-coordinated by two pyridine, two nitrato and two aqua ligands, and shows a distorted octahedral coordination environment. The interaction of the complex with FS-DNA has been investigated by electronic absorption, competitive fluorescence titration, circular dichroism and voltammetric techniques. It can be concluded that the Co(Ⅱ) complex intercalates into the base pairs of DNA as evidenced by a hypochromic effect of the absorption spectra, by displacing ethidium bromide bound to DNA and by induced CD spectral changes. The complex has also the ability to cleave supercoiled plasmid DNA.

机译：在大气条件下，通过原料Na3的氧化还原反应制备了单核Co（Ⅱ）配合物反式，反式，反式-[Co（py）_2（H_2O）_2（NO_3）_2]，其中py为吡啶。 [Co（NO_2）_6]。该产品已通过元素分析，光谱方法（UV-Vis和IR）和单晶X射线结构分析进行了表征。 Co（Ⅱ）原子被两个吡啶，两个硝基和两个水配体六配位，并显示出扭曲的八面体配位环境。通过电子吸收，竞争荧光滴定，圆二色性和伏安技术研究了复合物与FS-DNA的相互作用。可以得出结论，Co（Ⅱ）配合物插入到DNA的碱基对中，如吸收光谱的减色效应，取代结合到DNA上的溴化乙锭和诱导的CD光谱变化所证明。该复合物还具有切割超螺旋质粒DNA的能力。

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《Polyhedron: The International Journal for Inorganic and Organometallic Chemistry》 |2013年第null期|共8页
作者
Hassan Hadadzadeh; Mona Salimi; Matthias Weil; Mohammad Taghi Behnamfar; Farivash Darabi;
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正文语种 eng
中图分类无机化学;
关键词
Co(Ⅱ) complex; X-ray crystallography; DNA binding; Partial intercalation; Circular dichroism; Hypochromic effect;

机译：Co（Ⅱ）配合物;X射线晶体学;DNA结合;部分嵌入;圆二色性;变色效应;

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1. Complex conversion of the redox pair Co~Ⅲ-NO_2 to Co~Ⅱ-NO_3: Synthesis, crystal structure and DNA-binding of trans,trans,trans-[Co(py)_2(H_2O)_2(NO_3)_2] [J] . Hassan Hadadzadeh, Mona Salimi, Matthias Weil, Polyhedron: The International Journal for Inorganic and Organometallic Chemistry . 2013,第Null期

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Complex conversion of the redox pair Co~Ⅲ-NO_2 to Co~Ⅱ-NO_3: Synthesis, crystal structure and DNA-binding of trans,trans,trans-[Co(py)_2(H_2O)_2(NO_3)_2]

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