柔性苯并咪唑和羧酸构筑的配合物合成与表征

发布时间：2018-06-19 16:08

  本文选题：配合物 + 柔性双苯并咪唑　； 参考：《华北理工大学》2017年硕士论文

【摘要】：作为重要的有机无机杂化材料,配位聚合物因其多样的结构和优良的理化性质吸引着越来越多的科学家们的青睐。然而,受多种因素的影响尤其是金属离子和有机配体的影响,配位聚合物在结构上表现出很大的差异。因此,选择适当的金属离子和有机配体对目标产物的定向组装十分关键。设计合成出五种柔性双苯并咪唑配体,将其与不同芳香羧酸混合,在水热条件下分别与钴/镍金属盐反应得到十种结构各异的配合物。通过元素分析、IR光谱、XRPD等测试手段对其结构进行了表征,并探究了配合物的热重、固体漫反射和荧光性能以及作为催化剂在类Fenton反应体系中催化降解甲基橙的活性。利用4,4'-二(苯并咪唑-1-亚甲基)联苯(L1)和不同的羧酸混配,与Co(Ⅱ)离子反应得到四个结构相异的配位聚合物。配合物1和2都是一维链结构;配合物3和4分别为二维(4,4)和二维SP 2-periodic net(6,3)Ia网络结构。此外,配合物2和4分别通过氢键作用延伸为二维和三维超分子结构。采用柔性双苯并咪唑配体L2~L5和芳香羧酸混合,水热条件下与Co(Ⅱ)/Ni(Ⅱ)离子反应合成了六个未报道的金属配位聚合物。配合物5为具有4-连接的二维htb结构。配合物6、9和10均是二维(4,4)结构,其中6和10分别通过氢键作用扩展为三维3,3,4T3和3,3,4T27超分子网络。配合物7是二重互穿的金刚石三维框架。配合物8是一维管状结构,通过氢键延展成二维超分子结构。表征和性能测试表明,除了配合物10,1~9都表现出较高的热稳定性。配合物1~4显示出良好的固体漫反射性质,而配合物5,6和8则呈现出较强的荧光性能。配合物2,3,4,7和10在降解甲基橙的类Fenton体系中表现出较高的催化活性,可作为潜在的催化材料。
[Abstract]:As an important organic and inorganic hybrid material, coordination polymers attract more and more scientists because of their diverse structures and excellent physicochemical properties. However, due to the influence of many factors, especially metal ions and organic ligands, the structure of coordination polymers is very different. Therefore, the selection of appropriate metal ions and organic ligands is critical to the targeted assembly of the target products. Five flexible bis (benzimidazole) ligands were designed and synthesized, which were mixed with different aromatic carboxylic acids and reacted with cobalt / nickel metal salts under hydrothermal conditions to obtain ten complexes with different structures. The structure of the complex was characterized by elemental analysis, IR spectra and XRPD, and the thermogravimetric, diffuse reflectance and fluorescence properties of the complexes and the catalytic activity of the complexes as catalysts for the degradation of methyl orange in Fenton-like reaction system were investigated. Four coordination polymers with different structures were obtained by the reaction of 4 ~ (4) C ~ (4 +) -bis (benzimidazole-1-methylene-biphenyl) L _ (1) with different carboxylic acids with Co (鈪，

本文编号：2040441