Syntheses, Structures, and Photoluminescence of a Series of Three-Dimensional Cd(II) Frameworks with a Flexible Ligand, 1,5-Bis(5-tetrazolo)-3-oxapentane
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- 作者：Ping Cui ; Zhi Chen ; Dongliang Gao ; Bin Zhao ; Wei Shi ; Peng Cheng
- 刊名：Crystal Growth & Design
- 出版年：2010
- 出版时间：October 6, 2010
- 年：2010
- 卷：10
- 期：10
- 页码：4370-4378
- 全文大小：1164K
- 年卷期：v.10,no.10(October 6, 2010)
- ISSN：1528-7505
文摘
Six novel CdII-based metal−organic frameworks with a flexible ligand 1,5-bis(5-tetrazolo)-3-oxapentane) (H2btz), [Cd5(N3)6(btz)2]n (1), [Cd5X2(N3)4(btz)2]n (X = Cl (2), Br (3)), [Cd3(N3)2(btz)2]n (4), and [Cd3X2(btz)2]n (X = Cl (5), Br (6)), have been successfully synthesized under hydrothermal reactions and structurally characterized by single-crystal X-ray diffraction. The H2btz ligands in the complexes 1−4 can be in situ generated from the [2 + 3]-cycloaddition reaction of the precursor bis(2-cyanoethyl)ether (BCEE) and NaN3 under CdII-catalyzed. Single-crystal X-ray diffraction analysis revealed that all of the complexes 1−6 displayed rich three-dimensional (3D) frameworks constructed from Cd2+, btz2− ligand, and bridging anions. It has been found that the ingenious changes of anions finally lead to the structural diversity in 1−6, such as N3− for 1 and 4, N3− and Cl− for 2, N3− and Br− for 3, Cl− for 5, and Br− for 6. Additionally, the X-ray powder diffraction (XRPD), thermal stability, and the photoluminescence properties at room temperature in the solid state for 1−6 have also been studied.