Metal-organic frameworks constructed from three kinds of new Fe-containing secondary building units

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• 作者：Tian-zhan Zhang ; Ying Lu ; ^{luy968@nenu.edu.cn} ; Yang-guang Li ; Zhiming Zhang ; Wei-lin Chen ; Hai Fu ; En-bo Wang ; ^{wangeb889@nenu.edu.cn}
• 关键词：Metal&ndash ; organic framework ; Fe-containing second building unit ; Magnetic properties ; Structure elucidation
• 刊名：Inorganica Chimica Acta
• 出版年：2012
• 期刊代码：40_00201693
• 类别：ch
• 出版时间：1 April, 2012
• 卷：384
• 期：Complete
• 页码：219-224
• 文件大小：791 K

摘要

Three new Fe-containing MOFs, H₃O[Fe₅(BTC)₃(OAc)₂(DMF)₂]路H₂O boldFont">1, [FeNa(m-BDC)₂]路NH₂(CH₃)₂ boldFont">2 and [N(CH₃)₄]₂[Fe₃(HBTC)(BTC)₂(H₂O)]路5.5H₂O boldFont">3 (BTC = 1,3,5-benzenetricarboxylate, m-BDC = 1,3-benzene-dicarboxylate), have been synthesized from the solvothermal reactions of iron salts and carboxylate ligands. The framework of boldFont">1 is constructed from two kinds of secondary building units (SBUs): the sinusoidal chain of iron octahedra SBU [Fe₂(COO)₆]_n^{2n鈭?/sup> and paddle-wheel SBU [Fe₂(COO)₄(DMF)]. Compound boldFont">1 represents the first example of Fe-containing MOFs constructed from two kinds of SBUs. The framework of boldFont">2 is built from zigzag-chain SBUs [FeNa(COO)₆]_n3n鈭?/sup> and m-BDC linkers. The framework of boldFont">3 is formed by linear tri-nuclear iron SBUs [Fe₃(COO)₈(H₂O)]2鈭?/sup> and triangular BTC linkers. To our knowledge, the Fe-containing sinusoidal chain SBU in boldFont">1, zigzag-chain SBU in boldFont">2 and linear tri-nuclear iron SBU in boldFont">3 are found in Fe-containing MOFs for the first time. Magnetic investigation indicates the present of antiferromagnetic exchange interaction within the iron units of compounds.}