A Series of 2D and 3D Novel Lanthanide Complexes Constructed from Squarate C4O42–: Syntheses, Structures, Magnetic Properties, and Near-infrared Emission Properties
A Series of 2D and 3D Novel Lanthanide Complexes Constructed from Squarate C4O42–: Syntheses, Structures, Magnetic Properties, and Near-infrared Emission Properties
复制标题
DOI：
10.1071/ch10459
复制
发表时间：
2011-11
影响因子：
1.1
通讯作者：
Li Wang;W. Gu;Xiujun Deng;Ling-Fei Zeng;Shengyun Liao;Ming Zhang;Linyan Yang;Xin Liu
中科院分区：
文献类型：
--
作者：
Li Wang;W. Gu;Xiujun Deng;Ling-Fei Zeng;Shengyun Liao;Ming Zhang;Linyan Yang;Xin Liu
三价镧系金属前体与方形配体（H2C4O4，3,4-二羟基-3-环丁烯-1,2-二酮）的溶剂热组合制备了八种新型配位聚合物，[Ln2(C4O4)3(H2O)4] (Ln = La–Nd, Ho) (1–5)， [Ln2(C4O4)3(H2O)8] (Ln = Er, Dy) (6, 7) 和 Tb2(C4O4)2(C2O4)(H2O)4 (8)。结构分析表明，方形配体显示出多种配位模式，可生成新颖的 2D 和 3D 框架。首次报道了三种新的配位模式，即双齿/单齿μ3 和两种双齿/单齿μ4 配位模式。此外，还讨论了Pr、Nd、Ho、Dy和Tb配合物的变温磁性能，Pr、Nd、Ho和Er配合物的固态近红外发光光谱及其热重分析。
The solvothermal combination of trivalent lanthanide metal precursors with a squarate ligand (H2C4O4, 3,4-dihydroxy-3-cyclobutene-1,2-dione) has afforded the preparation of a family of eight new coordination polymers, [Ln2(C4O4)3(H2O)4] (Ln = La–Nd, Ho) (1–5), [Ln2(C4O4)3(H2O)8] (Ln = Er, Dy) (6, 7), and Tb2(C4O4)2(C2O4)(H2O)4 (8). Structural analysis reveals that the squarate ligand displays versatile coordination modes to generate novel 2D and 3D frameworks. Three new coordination modes, a bidentate/monodentate μ3 and two bidentate/monodentate μ4 coordination modes, are first reported. In addition, the variable-temperature magnetic properties of the Pr, Nd, Ho, Dy, and Tb complexes, the solid-state near-infrared luminescence spectra of the Pr, Nd, Ho, and Er complexes, and their thermogravimetric analyses are discussed.