Synthesis, Crystal Structure and Properties of a Novel Tetranuclear Nickel（II） Complex with Azo-enolic-2-hydroxybenzamide

• 作者: CHEN Shi-Liang HAN Guo-Cheng LIU Zheng
• 来源期刊: 结构化学
• 学科: 化学
• 关键词: 苯甲酰胺 晶体结构 配合物 镍离子 烯醇式 偶氮 合成 羟基
• 年，卷（期）: 2012,（11）
• 页码范围: 1641-1649
• 页数: 9页
• 分类号: O621|O614.121
• 语种: 英文

摘要

A novel tetranuclear nickel(II) complex [NiaL2(DMF)2(H20)2'2DMF] (1, H4L = azo-enolic-2-hydroxybenzamide, DMF = N,N-dimethyl-formamide) has been synthesized and characterized by elemental analysis, UV, IR and X-ray single-crystal diffraction characterization. Complex 1 crystallizes in the monoclinic system, space group P21/n with a = 8.8944(11), b = 14.4583(18), c = 18.097(2) A, fl = 90.00(2), Z = 2 , V = 2327.2(5) A3, C40H48NI2Ni4OI4, Mr = 1155.66, Dc= 1.649 g/cm3,μ=1.672 mm1, F(000) = 1192, R = 0.0392 and wR = 0.0958. The local coordination environment around the nickel ions exist a distorted octahedral and quadrangle geometry in the molecular structure. Complex 1 exhibits strong photoluminescent emission in the ultraviolet region at room temperature. The electrochemical studies reveal that redox of Nia+/Ni2+ in the complex is a quasi-reversible process.