Abstract

Six zinc(II) complexes, [Zn(OCOPh)₂L^R] (R = 1, 2, 3, 4, 5, 6) were synthesized by the reaction of zinc benzoate and six para-substituted 4-phenyl-terpyridine complexes and their structures were confirmed by elemental analysis, FT-IR, ¹H NMR and X-ray single crystal diffraction analysis. Their photoluminescent properties in solid and in solutions of DMSO were studied. Three human cancer cell lines were used for antiproliferative potential: human lung cancer cell line (A549), human esophageal cancer cell line (Eca-109) and human breast cancer cell line (MCF-7). The results have shown that these zinc complexes have good inhibitory effects on cancer cells, which are better than that of the commonly used clinical drug cisplatin. The ability of the complexes to binding to CT-DNA was studied by UV spectroscopy and fluorescence titration, while the interaction between the complexes and CT-DNA, AT6, GC6 short-chain DNA sequences and G-quadruplex were analyzed by circular dichroism (CD). It is found that these complexes can bind to DNA, and the binding mode is mainly intercalator. The docking of the complexes with the DNA fragment was simulated using molecular docking software. All the results clearly display that the substituents at these ligands of the complexes have the substitution effects on the properties of photoluminescence, antiproliferative potential and DNA binding study.

Graphic abstract

中文翻译：

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苯甲酸锌三联吡啶复合物对光致发光、抗增殖潜力和 DNA 结合特性的取代作用研究。

摘要

 苯甲酸锌与六种对位取代的4-苯基-三联吡啶配合物反应合成了六种锌(II)配合物[Zn(OCOPh) ₂ L ^R ] ( R = 1, 2, 3, 4, 5, 6)其结构经元素分析、FT-IR、¹H NMR和X射线单晶衍射分析。研究了它们在固体和 DMSO 溶液中的光致发光特性。三种人类癌细胞系用于抗增殖潜力：人类肺癌细胞系 (A549)、人类食道癌细胞系 (Eca-109) 和人类乳腺癌细胞系 (MCF-7)。结果表明，这些锌配合物对癌细胞具有良好的抑制作用，优于临床常用药物顺铂。用紫外光谱和荧光滴定法研究了配合物与CT-DNA结合的能力，同时用圆二色性(CD)分析了配合物与CT-DNA、AT6、GC6短链DNA序列和G-四链体之间的相互作用。 ）。发现这些复合物可以与DNA结合，结合方式主要是嵌入剂。使用分子对接软件模拟复合物与 DNA 片段的对接。所有结果都清楚地表明，复合物这些配体上的取代基对光致发光特性、抗增殖潜力和 DNA 结合研究具有取代作用。

图形摘要