(1H-benzimidazol-2-ylmethyl)-(4-nitro-phenyl)-amine (L) and its Pd(II) and Pt(II) complexes have been synthesized as potential anticancer compounds and their structures were elucidated using a variety of physico-chemical techniques. The activation thermodynamic parameters were calculated using non-isothermal methods. Theoretical calculations invoking geometry optimization, charge distribution and molecular orbital description HOMO and LUMO were done using density functional theory. Natural bond orbital analysis (NBO) was performed for the investigation of major stabilizing orbital interactions. The experimental results, and the calculated molecular parameters, bond distances and angles, revealed a square-planar geometry around the metallic center through the pyridine-type nitrogen of the benzimidazole ring (N-py) and secondary amino group (NHsec) and two chlorine atoms. Electrochemical investigation of the complexes showed some irreversible, reversible, and quasi-reversible redox reactions. The synthesized ligand, in comparison to its metal complexes was screened for its antibacterial activity. The cytotoxicity assay of the complexes against three-cell lines breast cancer (MCF7), colon Carcinoma (HCT) and human heptacellular Carcinoma (Hep-G2) was studied. (C) 2011 Elsevier B. V. All rights reserved.
(1H-
苯并咪唑-2-基甲基)-(4-
硝基苯基)胺(L)及其Pd(II)和Pt(II)配合物已被合成作为潜在的抗癌化合物,其结构通过多种物理
化学技术得到阐明。使用非等温方法计算了活化热力学参数。利用密度泛函理论对几何优化、电荷分布和分子轨道描述(HOMO和LUMO)进行了理论计算。对主要稳定轨道相互作用进行了自然键轨道分析(NBO)。实验结果以及计算的分子参数、键长和键角表明,
金属中心周围通过
苯并咪唑环的
吡啶型氮(N-py)和次
氨键(NHsec)以及两个
氯原子呈现平面四边形几何结构。对配合物的电
化学研究显示了一些不可逆、可逆和准可逆的氧化还原反应。将合成的
配体与其
金属配合物进行了比较,以筛选其抗菌活性。研究了复合物对三种
细胞系乳腺癌(MCF7)、结肠癌(HCT)和人肝细胞癌(Hep-G2)的细胞毒性。
(C) 2011 Elsevier B.V. 保留所有权利。