作者:Peng-Fei Wang、Yan Duan、Deng-Ke Cao、Yi-Zhi Li、Li-Min Zheng
DOI:10.1039/b927100g
日期:——
This paper reports mixed ligated metal phosphonates with formula [Zn2(4-cppH)2(L1)] (1), [Zn3(4-cpp)2(L2)2]·2.5H2O (2), [Zn3(4-cpp)2(L3)]·H2O (3) and [Ni2(4-cppH)2(L1)3]·2H2O (4), where L1 = 1,4-bis(imidazol-1-ylmethyl)benzene, L2 = 1,3-bis(imidazol-1-ylmethyl)-benzene, L3 = 1,2-bis(imidazol-1-ylmethyl)benzene and 4-cppH3 = 4-carboxyphenylphosphonic acid. Compound 1 shows a layer structure in which the inorganic double chains made up of ZnO3N} and PO3C} tetrahedra are connected by L1 bridges in a trans-mode. In compound 2, an inorganic hexanuclear cluster is observed where the six zinc atoms are bridged purely through O–P–O units from four 4-cpp3−. The L2 ligand adopts both cis- and trans-coordination modes to link the hexanuclear clusters into a three-dimensional framework structure with primitive cubic pcu topology. Compound 3 displays another type of layer structure in which the inorganic chains made up of ZnO3N} (or ZnO4}) and PO3C} tetrahedra are linked by both the 4-cpp3− and L3 ligands. The L3 ligand adopts cis-coordination mode. Unlike Zn(II) ions in 1–3, the Ni(II) ions in compound 4 are octahedrally coordinated, and are bridged by both 4-cppH2− and L1 ligands, resulting in an interesting double layer structure with the lattice water filling in the intralayer space. The thermal stabilities, luminescent and magnetic properties are investigated.
本文报告了混合配位金属膦酸盐,化学式为 [Zn2(4-cppH)2(L1)] (1)、[Zn3(4-cpp)2(L2)2]·2.5H2O (2)、[Zn3(4-cpp)2(L3)]·H2O (3) 和 [Ni2(4-cppH)2(L1)3]·2H2O (4),其中 L1 = 1,4-bis(imidazol-1-ylmethyl)benzene,L2 = 1,3-bis(imidazol-1-ylmethyl)benzene,L3 = 1,2-bis(imidazol-1-ylmethyl)benzene,4-cppH3 = 4-羧基苯膦酸。化合物 1 显示出层状结构,其中由 ZnO3N} 和 PO3C} 四面体构成的无机双链通过 L1 桥联以 trans 方式连接。在化合物 2 中,观察到一个无机六核簇,其中六个锌原子完全通过四个 4-cpp3− 的 O–P–O 单元桥接。L2 配体采用顺式和反式配位模式,将六核簇连接成一个具有原始立方 pcu 拓扑的三维框架结构。化合物 3 显示出另一种层状结构,其中由 ZnO3N}(或 ZnO4})和 PO3C} 四面体构成的无机链通过 4-cpp3− 和 L3 配体连接。L3 配体采用顺式配位模式。与 1–3 中的 Zn(II) 离子不同,化合物 4 中的 Ni(II) 离子为八面体配位,并通过 4-cppH2− 和 L1 配体桥接,形成一种有趣的双层结构,晶格水填充在层间空间中。研究了其热稳定性、发光和磁性属性。