Microwave-Assisted Synthesis of a Series of Lanthanide Metal鈥揙rganic Frameworks and Gas Sorption Properties

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• 作者：Zu-Jin Lin ; Zhen Yang ; Tian-Fu Liu ; Yuan-Biao Huang ; Rong Cao
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：February 6, 2012
• 年：2012
• 卷：51
• 期：3
• 页码：1813-1820
• 全文大小：460K
• 年卷期：v.51,no.3(February 6, 2012)
• ISSN：1520-510X

文摘

A series of isostructural microporous lanthanide metal鈥搊rganic frameworks (MOFs) formulated as [Ln₂(TPO)₂(HCOO)]路(Me₂NH₂)路(DMF)₄路(H₂O)₆ {Ln = Y (1), Sm (2), Eu (3), Gd (4), Tb (5), Dy (6), Ho (7), Er (8), Tm (9), Yb (10), and Lu (11); H₃TPO = tris-(4-carboxylphenyl)phosphineoxide; DMF = N,N-dimethylformamide} has been synthesized under microwave-assisted solvothermal reaction for 30 min. Alternatively, if a conventional solvothermal reaction is carried out under the same temperature, a much longer time (3 days) is needed for the same phase in similar yield. Structure analysis reveals that the framework is a 4,8-connected network with point symbol (4¹⁰路6¹⁶路8²) (4⁵路6)², which is the subnet of alb net. Thermal gravimetric analyses performed on as-synthesized MOFs reveal that the frameworks have high thermal stability. The luminescent properties of 2, 3, 5, and 6 were investigated and show characteristic emissions for Sm(III), Eu(III), Tb(III), and Dy(III) at room temperature, respectively. Gas sorption properties of 1 and 3 were studied by experimentally measuring nitrogen, argon, carbon dioxide, methane, and hydrogen sorption isotherms. The resulting materials show high and preferential CO₂ adsorption over N₂ gas at ambient temperature, indicating that the present materials can be applied in a CO₂ capture process.