Terbium(III) and dysprosium(III) 8-connected 3D networks containing 2,5-thiophenedicarboxylate anion: Crystal structures and photoluminescence studies

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• 作者：Lippy F. Marques^a ; Molí ; ria V. dos Santos^b ; Sidney J.L. Ribeiro^b ; Eduardo Ernesto Castellano^c ; Flá ; via C. Machado^a ; ^{flavia.machado@ufjf.edu.br}
• 关键词：Coordination polymer ; 2 ; 5-Thiophenedicarboxylic acid ; Lanthanides
• 刊名：Polyhedron
• 出版年：2012
• 期刊代码：87_02775387
• 类别：ch
• 出版时间：11 May, 2012
• 卷：38
• 期：1
• 页码：149-156
• 文件大小：1019 K

摘要

Two novel coordination polymers with the formula {[Ln₂(2,5-tdc)₃(dmso)₂]路H₂O}_n (Ln = Tb(III) for (1) and Dy(III) for (2)), (2,5-tdc^{2鈭?/sup> = 2,5-thiophenedicarboxylate and dmso = dimethylsulfoxide) have been synthesized by the diffusion method and characterized by thermal analysis, vibrational spectroscopy and single crystal X-ray diffraction analysis. Structure analysis reveals that 2,5-tdc2鈭?/sup> play a versatile role toward different lanthanide ions to form three-dimensional metal-organic frameworks (MOFs) in which the lanthanides ions are heptacoordinated. Photophysical properties were studied using excitation and emission spectra, where the photoluminescence data show the high emission intensity of the characteristic transitions 5D₄ 鈫?#xA0;7F_J (J = 6, 5, 4 and 3) for (1) and 4F_9/2 鈫?#xA0;6H_J (J = 15/2, 13/2 and 11/2) for (2), indicating that 2,5-tdc2鈭?/sup> is a good sensitizer.}