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2,2′-二硝基-4,4′-联苯二甲酸构筑的四个稀土金属有机骨架

发布时间:2018-06-11 12:54

  本文选题:稀土金属有机骨架 + ′-二硝基- ; 参考:《无机化学学报》2017年11期


【摘要】:在溶剂热条件下,2,2′-二硝基-4,4′-联苯二甲酸(H2L)与Ln(NO3)3·6H2O反应,成功合成了4个稀土金属有机骨架(LOFs):[Ln L1.5(DMA)]n(Ln=Eu(1),Gd(2),Tb(3),Dy(4),DMA=N,N-二甲基乙酰胺)。采用元素分析、红外(IR)、热重(TGA)、单晶和粉末X射线衍射(XRD)对其结构进行了表征。晶体结构分析表明:LOFs 1~4均为单斜晶系、C2/c空间群,为异质同晶的双节点(3,8)-连接的三维(3D)拓扑结构。LOFs 1~4均具有高的热稳定性(分解温度Td322℃),1显示铕的特征荧光光谱,而3仅显示配体的荧光发射。
[Abstract]:Under solvothermal conditions, four rare earth metal organic frameworks (Ln L1.5DMA) have been successfully synthesized by the reaction of Lnno _ 3O _ 3H _ 2H _ 2H _ 2L _ 2N _ 2N _ 3O _ 3H _ 2N _ 2N _ 3H _ 2H _ 2H _ 2H _ 2H _ 2N _ 3H _ 2N _ 3H _ 2H _ 2H _ 2H _ 2H _ 2H _ 2N _ 2N _ 3H _ 2H _ 2N _ (2) O _ (2) O ~ (2 +) -dimethyl acetamide. [Ln L _ (1.5) (DMA)]. Their structures were characterized by elemental analysis, IR, TGA, single crystal and powder X-ray diffraction (XRD). The results of crystal structure analysis show that all of them are monoclinic system C _ 2 / c space group, and they are hetero-isocrystalline two-node ~ (8) ~ (8) -3 D ~ (3 D) structure. LOFs _ (1) ~ (4) has high thermal stability (decomposition temperature Td322 鈩,

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