作者:Israel Carreira-Barral、Miguel Riopedre-Fernández、Andrés de Blas、Jesús Mosquera、M. Eugenio Vázquez、Carlos Platas-Iglesias、David Esteban-Gómez
DOI:10.1016/j.jinorgbio.2020.110995
日期:2020.4
(L2) spacer. The corresponding binuclear CuII and ZnII complexes were prepared and isolated. The X-ray structures of the L1 ligand and the [Cu2L1Cl2]2+ complex evidence an unusual cis/trans conformation of one of the urea groups stabilized by an intramolecular hydrogen bond with the nitrogen atom of the pyridyl spacer. The CuII complexes form rather strong ternary complexes with phosphorylated anions.
本文中,我们介绍了两个配体的合成,这些配体包含两个通过1,1'-(吡啶-2,6-二基)双(3-乙基脲)(L1)或1,1'-(1,3-亚苯基)双(3-乙基脲)(L2)间隔基。制备并分离了相应的双核CuII和ZnII复合物。L1配体和[Cu2L1Cl2] 2+配合物的X射线结构表明,通过一个分子内氢键与吡啶基间隔基的氮原子稳定的脲基之一具有不寻常的顺式/反式构型。CuII配合物与磷酸化的阴离子形成相当强的三元配合物。[Cu2L1] 4+复合物对焦磷酸盐具有相当高的亲和力(在pH 7、25°C时logK11 = 8.19),而[Cu2L2] 4+由于与AMP2-的牢固结合而突出(在pH 7时logK11 = 9.3)。 ,25°C)。使用圆二色性(CD)和发光光谱法监测CuII复合物与小牛胸腺中脱氧核糖核酸(ct-DNA)的相互作用。这些研究表明复合物与ct-DNA有很强的相互作用(对于[Cu2L1]