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Three Novel Lanthanide Metal-Organic Frameworks (Ln-MOFs) Constructed by Unsymmetrical Aromatic Dicarboxylatic Tectonics: Synthesis Crystal Structures and Luminescent Properties

机译:非对称芳族二羧酸构造构造的三种新型镧系金属有机骨架(Ln-MOFs):合成晶体结构和发光性质

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摘要

Three novel Ln(III)-based coordination polymers, {[Ln2 (2,4-bpda)3 (H2O)x]·yH2O}n (Ln = La (III) (>1), x = 2, y = 0, Ce (III) (>2), Pr (III) (>3), x = 4, y = 1) (2,4-H2bpda = benzophenone-2,4-dicarboxylic acid) have been prepared via a solvothermal method and characterized by elemental analysis, IR, and single-crystal X-ray diffraction techniques. Complex >1 exhibits a 3D complicated framework with a new 2-nodal (3,7)-connected (42·5) (44·51·66·8) topology. Complexes >2 and >3 are isomorphous, and feature a 3D 4-connected (65·8)-CdSO4 network. Moreover, solid-state properties such as thermal stabilities and luminescent properties of >1 and >2 were also investigated. Complex >1 crystallized in a monoclinic space group P21/c with a = 14.800 (3), b = 14.500 (3), c = 18.800 (4) Å, β = 91.00 (3), V = 4033.9 (14) Å3 and Z = 4. Complex >2 crystallized in a monoclinic space group Cc with a = 13.5432 (4), b = 12.9981 (4), c = 25.7567 (11) Å, β = 104.028 (4), V = 1374.16 (7) Å3 and Z = 4.
机译:三种新型的基于Ln(III)的配位聚合物{[Ln2(2,4-bpda)3(H2O)x]·yH2O} n(Ln = La(III)(> 1 ),x = 2,y = 0,Ce(III)(> 2 ),Pr(III)(> 3 ),x = 4,y = 1)(2,4- H2bpda =二苯甲酮-2,4-二羧酸)是通过溶剂热法制备的,并通过元素分析,红外光谱和单晶X射线衍射技术进行了表征。复杂> 1 展示了一个3D复杂框架,其中包含一个新的2节点(3,7)连接(4 2 ·5)(4 4 ·5 1 ·6 6 ·8)拓扑。复合物> 2 和> 3 是同构的,并具有3D 4连接(6 5 ·8)-CdSO4网络。此外,还研究了> 1 和> 2 的固态性能,例如热稳定性和发光性能。络合物> 1 在单斜空间群P21 / c中结晶,其中a = 14.800(3),b = 14.500(3),c = 18.800(4)Å,β= 91.00(3),V = 4033.9(14)Å 3 且Z =4。络合物> 2 在单斜空间群Cc中结晶,其中a = 13.5432(4),b = 12.9981(4),< em> c = 25.7567(11)Å,β= 104.028(4), V = 1374.16(7)Å 3 Z = 4。

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