Syntheses, crystal structures, and photophysical properties of two 2-D coordination polymers with different geometries of lead(II)
作者:Li Yan、Wei Liu、Chuanbi Li、Yifei Wang
DOI:10.1080/00958972.2013.772595
日期:2013.3.1
Two complexes constructed from aromatic acid and N-heterocyclic ligands have been synthesized by hydrothermal reaction: [Pb(cipt)(NDC)](n) (1) [cipt=2-(3-chlorophenyl)-1H-imidazo[4,5-f][1,10]phenanthroline, NDC=naphthalene-1,4-dicarboxylic acid] and [Pb(ipm)(BDC)(2)](n) (2) [BDC=terephthalic acid, ipm=5-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)-2-methoxyphenol]. Single-crystal X-ray analysis shows that 1 exhibits an interesting arm-shaped chain structure. 1-D ladder chain structure is formed by N-H center dot center dot center dot O bonding interactions and further into a 2-D network by N-H center dot center dot center dot O hydrogen bonds and interchain pi-pi stacking interactions. Complex 2 shows a 2-D butterfly wings structure, which has been rarely reported. The structure in 2 has intermolecular N-H center dot center dot center dot O interactions, which help in construction of the 3-D framework. In 1, the coordination sphere of Pb(II) is hemi-directed, whereas the Pb(II) geometry in 2 is holo-directed. The solid-state fluorescence spectra of 1 and 2 are also investigated, as well as the ligands cipt and ipm.
The DNA-binding behavior and DFT calculation of ruthenium(II) complexes [Ru(phen)<sub>2</sub>L](ClO<sub>4</sub>)<sub>2</sub> (L = HMOPIP and MOHPIP)
Abstract Two ruthenium(II) complexes, [Ru(phen)2HMPIP]2+ (1) and [Ru(phen)2MHPIP]2+ (2), have been synthesized and characterized by elemental analysis, ESI-MS, and 1H NMR spectroscopy. The DNA-binding properties of 1 and 2 have been investigated by electronic and emission spectra and viscosity experiments. The results show that both 1 and 2 can bind to DNA in intercalating mode, with 1 exhibiting stronger
摘要 合成了两种钌 (II) 配合物 [Ru(phen)2HMPIP]2+ (1) 和 [Ru(phen)2MHPIP]2+ (2),并通过元素分析、ESI-MS 和 1H NMR 对其进行了表征。光谱学。已通过电子和发射光谱以及粘度实验研究了 1 和 2 的 DNA 结合特性。结果表明,1和2都可以嵌入模式与DNA结合,其中1表现出更强的结合亲和力。当将 DNA 添加到溶液中时,两种复合物在 IL 和 MLCT 吸收带处的强减色性以及在两种复合物存在下 CT-DNA 的相对粘度增加都证实了这些。此外,根据电子光谱的衰减计算出的 1 和 2 的固有结合常数分别为 3.82 × 105 和 2.06 × 105 M-1。最后,
Arene ruthenium(ii) complexes induce S-phase arrest in MG-63 cells through stabilization of c-Myc G-quadruplex DNA
作者:Cundong Fan、Qiong Wu、Tianfeng Chen、Yibo Zhang、Wenjie Zheng、Qi Wang、Wenjie Mei
DOI:10.1039/c3md00367a
日期:——
protein expression. The in vitro DNA-binding behaviors also indicated that 2a could stabilize c-Myc G-quadruplexDNA (G4-DNA) by affecting its conformation. In conclusion, these results suggest that arene Ru(II) complexes coordinated by phenanthroimidazole derivatives serve as c-Myc G4-DNA stabilizers that could induce S-phase arrest in cancer cells by triggering DNA damage, which suggest that these
合成了一系列由菲并咪唑衍生物配位的芳烃钌(II)配合物,并对其体外抗癌活性进行了评估。已经发现这些类型的芳烃Ru(II)配合物,特别是[(C 6 H 6)Ru(o- ClPIP)Cl] Cl·2H 2 O(2a)对几种人类癌细胞系表现出可接受的抗增殖活性。但对正常HK-2人细胞毒性低。机理研究表明2a骨肉瘤MG-63细胞诱导的生长抑制主要是由S期细胞周期停滞引起的,这通过蛋白水平的蛋白质印迹分析通过细胞周期蛋白A和CDK2的下调来证实。此外,在单个细胞水平上使用彗星试验的研究表明,如磷酸化p53和组蛋白的上调所示,2a触发了MG-63细胞的DNA损伤,并随后引发了S期停滞。此外,MG-63细胞暴露于2a导致c-Myc蛋白表达下调。在体外DNA结合行为还指出,图2a能够稳定c-Myc的G-四链体DNA(G4-DNA)通过影响其构象。总之,这些结果表明,由苯并咪唑衍生物配位的芳烃Ru(II)配合物可作为c-Myc