Cadmium鈥揊urandicarboxylate Coordination Polymers Prepared with Different Types of Pyridyl Linkers: Synthesis, Divergent Dimensionalities, and Luminescence Study

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• 作者：Rupam Sen ; Dasarath Mal ; Paula Brand茫o ; Rute A. S. Ferreira ; Zhi Lin
• 刊名：Crystal Growth & Design
• 出版年：2013
• 出版时间：December 4, 2013
• 年：2013
• 卷：13
• 期：12
• 页码：5272-5281
• 全文大小：599K
• 年卷期：v.13,no.12(December 4, 2013)
• ISSN：1528-7505

文摘

Five new metal鈥搊rganic frameworks (MOFs) have been synthesized by using cadmium ion and 2,5-furandicarboxylic acid in presence of a variety of bridging amine ligands, [Cd(fdc)(2,2鈥?bpy)(H₂O)]_n (1), {[Cd(fdc)(pyz)(H₂O)₂][Cd(fdc)](H₂O)₂]路H₂O}_n (2), {[Cd(fdc)(4,4鈥?bpy)(H₂O)₂]路EtOH}_n (3), [Cd(fdc)(1,2-bpe)(H₂O)]_n (4), and [{Cd₂(fdc)₂(H₂O)₄}路(1,2-bpe)]_n (5), where fdc = 2,5-furandicarboxylic acid, 2,2鈥?bpy = 2,2鈥?bipyridyl, pyz = pyrazine, 4,4鈥?bpy = 4,4鈥?bipyridyl, 1,2-bpe = 1,2-di(4-pyridyl)ethylene. All the compounds were characterized by single-crystal X-ray analysis and show diversities in their structures. Compound 1 shows linear topology propagating along the crystallographic b-axis. Compound 2 shows supramolecular structure, where two types of 1D double chains (ladder type) are present. These chains propagate along the crystallographic a-axis and are tightly held with each other by strong hydrogen bonds. Compound 3 reveals a 1D + 1D 鈫?2D polycatenated MOF, where four cadmium centers form a perfect square and these squares are further linked by the carboxylate ligand, forming a 1D tube. These tubes are interpenetrated with each other forming a polycatenated 3D MOF. Compound 4 also possesses a polycatenated MOF, but 1D sheets are polycatenated with each other forming the 1D + 1D 鈫?3D MOF. Compound 5 is a 2D-based supramolecular 3D MOF, where 1,2-bpe ligands are entrapped within the layer of the 2D by strong hydrogen bonds and 蟺路路路蟺 interaction. Luminescence of all the compounds has been investigated.