Diversity of Lanthanide(III)鈥揙rganic Extended Frameworks with a 4,8-Disulfonyl-2,6-naphthalenedicarboxylic Acid Ligand: Syntheses, Structures, and Magnetic and Luminescent Properties

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• 作者：Qing-Yan Liu ; Wu-Fang Wang ; Yu-Ling Wang ; Zeng-Mei Shan ; Ming-Sheng Wang ; Jinkui Tang
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：February 20, 2012
• 年：2012
• 卷：51
• 期：4
• 页码：2381-2392
• 全文大小：722K
• 年卷期：v.51,no.4(February 20, 2012)
• ISSN：1520-510X

文摘

A sulfonate鈥揷arboxylate ligand, 4,8-disulfonyl-2,6-naphthalenedicarboxylic acid (H₄-DSNDA), and eight new lanthanide coordination polymers {[Pr₄(OH)₄(DSNDA)₂(H₂O)₁₂](H₂O)₁₀}_n (1), [Ln(H₂-DSNDA)_0.5(DSNDA)_0.5(H₂O)₅]_n (Ln = La(2), Nd(3), Sm(4), Eu(5), Gd(6), and Dy(7)), and {[Er(H-DSNDA)(H₂O)₄](H₂O)}_n (8) have been synthesized. Detailed crystal structures of these compounds have been investigated. Compound 1 has a 3D framework featuring the unique cubane-shaped [Pr₄(渭₃-OH)₄] clusters and is a binodal 4,8-connected network with (4¹⁶路6¹²)(4⁴路6²)₂ topology. Compounds 2鈥?b>7 are isostructural and have 2D layered structures. Compound 8 is also a 2D layer but belongs to different structural types. The luminescence behavior of compound Eu(5) shows that the 蟺-rich aromatic organic ligands efficiently transfer the absorbed light energy to the Eu(III) ions, thus enhancing the overall luminescent properties of compound Eu(5). The magnetic properties of all compounds except for the diamagnetic La(2) compound have been investigated. In addition, elemental analysis, IR spectra, and thermogravimetric analysis of these compounds are also described.