mechanistic studies have shown how they can interfere at the endothelial reticulum level inducing the pro-apoptotic branch of the unfolded protein response (UPR). The actin-normalized CHOP to BiP density ratios suggest that the novel compounds induce preferentially the pro-apoptotic UPR signalling driven by the CHOP, in a dose-dependent way and according to the substituents in the coumarin moiety.
我们制备了六种分子式为 [Cu(phen) 2 (L x )](ClO 4 )( x : 1–6)的配合物,其中辅助配体 L x是在第 6 或第 7 位带有草酰乙酸酯部分的香豆素羧酸酯衍生物,并且第三或第四位有不同的取代基。配合物显示出围绕金属离子的五配位几何形状。在八面体几何结构中完成配位球的可能性使得分子能够进一步反应。复合物主要通过静电相互作用和凹槽结合表现出对DNA的亲和力,而与DNA碱基对的相互作用则由辅助配体保证。杂配体 Cu( II)复合物在微摩尔浓度范围内表现出细胞毒活性,并且机制研究表明它们如何在内皮网水平上干扰,诱导未折叠蛋白反应(UPR)的促凋亡分支。肌动蛋白归一化的 CHOP 与 BiP 密度比表明,新型化合物优先诱导由 CHOP 驱动的促凋亡 UPR 信号传导,以剂量依赖性方式并根据香豆素部分中的取代基。
Alteration of molecular conformations and spectral properties for nickel(II), zinc(II) and copper(II) complexes having 3,8-di(thiophen-2′,2′′-yl)-1,10-phenanthroline ligands
Four transition metal complexes of 3,8-di(thiophen-2',2 ''-yl)-1,10-phenanthroline (dtphen), formulated as [Ni(dtphen)(2)(H(2)O)(2)]center dot(ClO(4))(2) (1), [Zn(dtphen)(2)(H(2)O)]center dot(ClO(4))(2) (2) [Cu(dtphen)(2)(H(2)O)]center dot(ClO(4))(2) (3), [Cu(dtphen)(phen)(2)]center dot(ClO(4))(2) (4) (phen = 1,10-phenanthroline) with different metal-to-ligand ratios, were synthesized and characterized herein. The X-ray single-crystal diffraction studies of 1-4 exhibit that different molecular configurations for the dtphen ligand can be observed where the side thiophene rings adopt the trans/trans, trans/cis, trans/disorder and cis/cis conformations relative to the central 1,10-phenanthroline unit in different compounds. Fluorescence emission spectra of 1-4 in methanol show that the fluorescence emission of 2 is much stronger than the other three metal complexes, which is mainly due to its full d(10) electronic configuration of Zn(II) ion. (C) 2010 Elsevier B.V. All rights reserved.
Insight into self-assembly of malonate-based copper(II) phenanthroline complexes: Syntheses, crystal structures and properties
molecule, (mal−) anion and an apical X group (X = H2O, ClO4−, [Cu(phen)(H2O)(mal)], n = 0, +1). [3]·11H2O is built up of the hydrogen-bonded [Cu3(phen)3(H2O)2(mal)3] trimers and (H2O)11 clusters, while [4]ClO4 and [5](ClO4)2 feature 1D 1∞ [Cu2(phen)2(H2O)3(mal)](ClO4)2/2}+ chain and hexanuclear [Cu6(phen)6(H2O)2(mal)4(ClO4)2]2+ complex cations, respectively. Self-assembly routes to the malonate-based
Novel cyano-bridged mixed-valent copper complexes formed by completely in situ synthetic method via the cleavage of C–C bond in acetonitrile
作者:Feng Xu、Wei Huang、Xiao-Zeng You
DOI:10.1039/c0dt00345j
日期:——
A series of novel cyano-bridged mixed-valent copper complexes with different nuclearities, where the cyanide group is obtained from the cleavage of a carbon–carbon (C–C) bond in acetonitrile under mild conditions, have been prepared and structurally characterized via a completely in situ synthetic method. The method is catalyzed by 2,2′-bipyridine and 1,10-phenanthroline-based CuII complexes in the