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在170℃水热条件下,利用La2O3/Eu2O3、CH3COOH和H2SO4反应得两例异质同晶的配位聚合物La(H2O)2(CH3CO2)(SO4)和Eu(H2O)2(CH3CO2)(SO4)。金属Ln(Ⅲ)原子与乙酸根离子、硫酸根离子和水分子配位,处于一个九配位几何中心。乙酸根离子和硫酸根离子作为桥联配体,分别与3个金属原子形成“T”字形的节点,沿着晶胞[010]和[100]方向形成一维阶梯,两条链通过共享Ln(Ⅲ)离子从而形成了新颖的交错阶梯状拓扑层结构,熊夫利符号为36·413·52。相邻层间通过O—H…O氢键作用连接成三维超分子结构。对配合物La(H2O)2(CH3CO2)(SO4)和Eu(H2O)2(CH3CO2)(SO4)进行红外光谱和差热-热重分析等表征,并探究了室温下后者的固体荧光性质。
Two kinds of isomorphic coordination polymers, La (H2O) 2 (CH3CO2) (SO4) and Eu (H2O) 2 (CH3CO2) (CH3CO2) were synthesized by the reaction of La2O3 / Eu2O3, CH3COOH and H2SO4 under hydrothermal conditions at 170 ℃ SO4). Metal Ln (Ⅲ) atoms and acetate ions, sulfate ions and water molecules coordinate in a nine coordination geometric center. Acetate and sulfate ions act as bridging ligands, forming “T” -shaped nodes with three metal atoms, forming a one-dimensional ladder along [010] and [100] The Ln (Ⅲ) ions are shared to form a novel staggered topological structure of staggered layers, with the Schulman symbol 36 · 413 · 52. Adjacent layers are connected into three-dimensional supramolecular structure through O-H ... O hydrogen bonding. Characterization of the complexes La (H2O) 2 (CH3CO2) (SO4) and Eu (H2O) 2 (CH3CO2) (SO4) by infrared spectroscopy and differential thermal-thermogravimetric analysis, and to explore the solid fluorescence properties of the latter at room temperature .