Phosphate Diester Hydrolysis and DNA Damage Promoted by New <i>cis</i>-Aqua/Hydroxy Copper(II) Complexes Containing Tridentate Imidazole-rich Ligands
作者:Marciela Scarpellini、Ademir Neves、Rosmari Hörner、Adailton J. Bortoluzzi、Bruno Szpoganics、César Zucco、René A. Nome Silva、Valderes Drago、Antônio S. Mangrich、Wilson A. Ortiz、Wagner A. C. Passos、Maurício C. B. de Oliveira、Hernán Terenzi
DOI:10.1021/ic026277c
日期:2003.12.1
including magnetochemistry, electrochemistry, and EPR and UV-vis spectroscopies. The crystal structures of 1 and 2 were determined by X-ray crystallography and revealed two neutral complexes with their tridentate chelate ligands meridionally coordinated. Completing the coordination spheres of the square-pyramidal structures, a chloride ion occupies the apical position and another is bonded in the basal plane
合成并表征了三齿席夫碱[(2-(咪唑-4-基)乙基)(1-甲基咪唑-2-基)甲基)亚胺(HISMIMI)及其还原形式HISMIMA,以及它们的单核顺二卤铜(II)配合物1和2。此外,还分别分离了从配合物1和2获得的双核[CuII(mu-OH)2CuII](2+)配合物(3)和(4),并通过多种物理化学技术对其进行了表征,包括磁化学,电化学,以及EPR和紫外可见光谱。1和2的晶体结构通过X射线晶体学测定,揭示了两个中性配合物,它们的三齿螯合配体经子午配位。完整的方形锥体结构的配位球,氯离子占据了顶端位置,另一个结合在基面上。此外,还通过红外,电子和EPR光谱学,循环伏安法和电位平衡研究研究了配合物1和2。以2,4-BDNPP为底物,研究了1和2对磷酸二酯裂解的水解活性。这些实验在50摄氏度下进行,数据处理基于Michaelis-Menten方法,给出以下动力学参数(复合物1 /复合物2):vmax(摩尔L(-1)s(-1))