A series of one-dimensional (1-D) N-succinopyridine-based complexes: [Cu(L−)(H2O)2]Cl·2H2O (1), [Pr(L−)(H2O)4]Cl2 (2), [Ln(L−)(H2O)5]Cl2·3H2O (Ln = Eu (3), Gd (4)), and [Er(L−)(H2O)4]Cl2·H2O (5) (HL = N-succinopyridine (−OOC–CH(N+C5H5)–CH2–COOH)) have been prepared and characterized by single-crystal X-ray diffraction. The frameworks of complexes 1, 2 and 5 constructed from dinuclear metal building blocks exhibit 1-D double-strand loop-like chains; these chains are further connected to each other by hydrogen bonds forming a 3-D supramolecular architecture. Whereas complexes 3 and 4 feature hydrogen bonding 2-D supramolecular networks assembled from 1-D chains that are constructed from mononuclear metal building blocks. The effects of different metal ions, steric hindrance and coordination diversities of HL on the polymeric architectures have been discussed. In addition, thermogravimetric and magnetic properties of these complexes were also investigated in this paper.
一系列基于 N-琥珀酰基
吡啶的一维 (1-D) 复合物:[Cu(L-)(
H2O)2]Cl-2 (1)、[Pr(L-)( )4]Cl2(2)、[Ln(L-)( )5]Cl2-3 (Ln = Eu(3)、Gd(4))、和 [Er(L-)( )4]Cl2- (5)(HL = N-琥珀
吡啶 (-OOC-CH(N+
C5H5)-
CH2-COOH)),并通过单晶 X 射线衍射进行了表征。复合物 1、2 和 5 的框架由双核
金属结构单元构建而成,呈现出 1-D 双链环状链;这些链通过氢键进一步相互连接,形成 3-D 超分子结构。而复合物 3 和 4 则具有氢键 2-D 超分子网络,这些网络由单核
金属构件的 1-D 链组装而成。讨论了不同
金属离子、立体阻碍和 HL 配位多样性对聚合物结构的影响。此外,本文还研究了这些复合物的热重和磁性。