摘要 合成了 NNO 供体三齿席夫碱 4-溴-2-(((3-(甲基氨基)丙基)亚氨基)甲基)苯酚 (HL) 的铜 (II) 和锌 (II) 配合物,并通过不同的表征物理化学方法包括单晶XRD、元素分析、IR、电子和EPR光谱分析。铜 (II) 配合物是一种一维配位聚合物,其中氯作为桥接配体,锌 (II) 配合物是双连接的。已经进行了复合物的 Hirshfeld 表面分析,这提供了对分子间相互作用的更好理解。研究了溶剂对电荷转移带和 dd 带的影响,前者显示出负的溶剂化变色行为,而后者在增加溶剂极性时表现出积极的行为。对发光特性进行了分析,发现铜 (II) 和锌 (II) 配合物分别表现出荧光的猝灭和增强,这得到了量子产率值的支持。两种复合物的细胞毒活性已在体外针对淋巴瘤腹水细胞系进行了筛选。此外,已筛选出复合物对蜡样芽孢杆菌、金黄色葡萄球菌、肺炎克雷伯菌和大肠杆菌的抗菌活性。
Anion mediated diversity in the nuclearity of nickel(II) complexes with a N2O donor Schiff base: Formation of a supra-molecular chain via Br⋯Br interactions
Two nickel(II) complexes, [Ni(L)(2)] (1) and [Ni-2(mu(1,1)-N-3)(2)(L)(2)(DMSO)(2)] (2) [where HL = 3-(methyl-amino)propyliminomethyl-4-bromophenol, a tridentate Schiff base], have been synthesized and characterized by elemental analysis, IR, UV-Vis and fluorescence spectroscopy and single-crystal X-ray diffraction studies. The deprotonated tridentate Schiff base occupies three coordination sites of nickel(II) in each of the complexes. In the absence of any secondary coordinating anions, the octahedral geometry of nickel(II) in complex 1 is completed by the coordination of a second molecule of the tridentate Schiff base. On the other hand, in complex 2, the fourth coordination site of nickel(II) is occupied by an azide. A symmetry related azide from a different molecule coordinates the fifth site of nickel(II), thereby forming a double end-on azide bridged centrosymmertric dimer. An oxygen from a DMSO molecule occupies the sixth coordination site of nickel(II) to complete its octahedral geometry. There are hydrogen bonding and C-H center dot center dot center dot pi interactions within the dinuclear moiety of complex 2. A one-dimensional chain along the a axis is produced in complex 1 via a Br center dot center dot center dot Br interaction. (C) 2014 Elsevier Ltd. All rights reserved.