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]·2.5 (2)、[Zn3(4-cpp)2(L3)]·
H2O (3) 和 [Ni2(4-cppH)2(L1)3]·2 (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。