基于2-苯基-4-喹啉酸及双咪唑类配体的钴(Ⅱ)配合物的合成、表征、磁性和电化学性质(英文)

Syntheses, Characterizations, Magnetic Susceptibility, and Electrochemical Property of Cobalt Complex Based on 2-Phenyl-4-quinolinecarboxylic Acid and Imidazol-Based Linker

利用2-苯基-4-喹啉酸、苯-1,4-双(咪唑基-1-甲基)和乙酸钴在二甲基甲酰胺和水的混合溶剂中反应,得到配合物[Co(pqba)2(biyb)](1)(Hpqba=2-苯基-4-喹啉酸,biyb=苯-1,4-双(咪唑基-1-甲基))。采用元素分析、红外光谱、X单晶衍射结构分析、热重分析等方法对配合物进行了表征和结构测定。配合物1属单斜晶系,C2/c空间群。配合物1中的biyb配体采用双齿桥链模式连接金属钴离子首先形成一维"之"字链,通过π…π堆积作用,进一步拓展为二维超分子结构。循环伏安法测试结果说明配合物1的电解过程为准可逆过程。磁化率测量表明,配合物1具有反铁磁性质。

One new metal-organic framework, namely, [Co（pqba）2（biyb）] （1） （2-phenyl-4-quinolinecarboxylic acid= Hpqba, 1,4-bis （imidazol-l-ylmethyl）benzene =biyb）, has been synthesized under hydrothermal conditions. The compound 1 was characterized by elemental analysis, IR spectroscopy, and X-ray single-crystal diffraction. Complex 1 crystallizes in the Monoclinic system, C2/c space group. In 1, the biyb act as bidentate ligands assembling with Co（1） ions to a one-dimensional framework, which is further expanded to form a 2D supramolecular structure by π... π stacking interactions with biyb molecules between 1D chains. Thermogravimetric analyses for 1 is discussed. Furthermore, electrochemical property of the 1 shows that electron transfer of Co（lI） between co（m） in electrolysis is quasi-reversible process, and magnetic susceptibility measurements indicate that compound 1 has dominating antiferromagnetic couplings between metal ions. CCDC： 919474.