Synthesis, spectral characterization, DNA binding ability and antibacterial screening of copper(II) complexes of symmetrical NOON tetradentate Schiff bases bearing different bridges
作者:Saleh O. Bahaffi、Ayman A. Abdel Aziz、Maher M. El-Naggar
DOI:10.1016/j.molstruc.2012.04.017
日期:2012.8
Abstract A novel series of four copper(II) complexes were synthesized by thermal reaction of copper acetate salt with symmetrical tetradentate Schiff bases, N,N′bis(o-vanillin)4,5-dimethyl-l,2-phenylenediamine (H 2 L 1 ), N,N′bis(salicylaldehyde)4,5-dimethyl-1,2-phenylenediamine (H 2 L 2 ), N,N′bis(o-vanillin)4,5-dichloro-1,2-phenylenediamine (H 2 L 3 ) and N,N′bis(salicylaldehyde)4,5-dichloro-1,2-phenylenediamine
摘要 通过乙酸铜盐与对称四齿席夫碱、N,N'双(邻香兰素)4,5-二甲基-l,2-苯二胺(H 2 L 1 ), N,N'双(水杨醛)4,5-二甲基-1,2-苯二胺(H 2 L 2 ), N,N'双(邻香兰素)4,5-二氯-1,2-苯二胺(H 2 L 3 )和N,N'双(水杨醛)4,5-二氯-1,2-苯二胺(H 2 L 4 )分别。所有新合成的配合物分别通过微量分析、FT-IR、UV-Vis、磁性测量、ESR 和电导测量进行表征。数据显示所有席夫碱(H 2 L 1-4 )以其去质子化形式配位并且表现为四齿NOON配位配体。此外,它们的铜(II)配合物具有方形平面几何形状,通式为 [CuL 1-4 ]。通过紫外-可见分光光度法、荧光猝灭和粘度测量研究了复合物与小牛胸腺 DNA (CT-DNA) 的结合。结果表明复合物通过嵌入模式与 CT-DNA 结合。从生物活性角度,通过孔扩散法筛选了铜(II