作者:Sujata Kashyap、Udai P. Singh、A. K. Singh、Pravindra Kumar、Shivendra Pratap Singh
DOI:10.1007/s11243-013-9725-5
日期:2013.8
The reaction of CuCl2·2H2O with 3,5-diisopropylpyrazole (PziPr2H) in the presence of sodium parafluorobenzoate (Na-p-FBz) resulted in the formation of an oxo-chloro-bridged tetranuclear complex [Cu4(PziPr2H)4(μ-O)(μ-Cl)6] 1, whereas the reaction of Cu(NO3)2·3H2O with PziPr2H in the presence of different benzoates gave [Cu(PziPr2H)2(μ-OCH3)]2(NO3)2 2, [Cu(PziPr2H)3(NO3)(p-ClBz)]·CH3CN 3, [Cu(p-CH3Bz)2(PziPr2H)]2·2CH3CN 4, [Cu(p-OCH3Bz)2(CH3CN)]2·4CH3CN 5 and [Cu(p-CNBz)(CH3CN)]2 6. Single-crystal X-ray diffraction studies confirmed these formulations. DNA binding studies for these complexes were performed by means of UV-visible absorption titration and viscosity measurements. Gel electrophoresis studies showed that hydroxyl radicals are involved in DNA cleavage in the presence of the complexes.
CuCl2·2H2O与3,5-二异丙基吡唑(PziPr2H)在对氟苯甲酸钠(Na-p-FBz)存在下反应,形成了氧-氯桥接的四核络合物[Cu4(PziPr2H)4(μ-O)(μ-Cl)6] 1;而Cu(NO3)2·3H2O与PziPr2H在不同苯甲酸存在下反应,得到[Cu(PziPr2H)2(μ-OCH3)]2(NO3)2 2、[Cu(PziPr2H)3(NO3)(p-ClBz)]·CH3CN 3、[Cu(p-CH3Bz)2(PziPr2H)]2·2CH3CN 4、[Cu(p-OCH3Bz)2(CH3CN)]2·4CH3CN 5和[Cu(p-CNBz)(CH3CN)]2 6。单晶X射线衍射研究确认了这些化合物的结构。通过紫外-可见吸收滴定和粘度测量对这些络合物的DNA结合进行了研究。凝胶电泳研究显示,在这些络合物存在下,羟基自由基参与了DNA的裂解。