Self-assembly of four one-dimensional molybdenum(V) phosphates linked by strontium and transition metal

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• 作者：Kai Yu^a ; ^b ; Baibin Zhou^a ; ^b ; ^{zhou_bai_bin@163.com} ; Yang Yu^c ; Zhanhua Su^b ; Chunmei Wang^b ; Chunxiao Wang^b ; Song Gao^b ; Ying Chen^b
• 关键词：Poly(oxomolybdophosphates) ; Strontium and transition linker ; Supramolecular assembly ; Electrochemical activity ; Magnetic property
• 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：8-17
• 文件大小：2443 K

摘要

Four reduced molybdenum(V) phosphates, [(py)₂(Himi)₄][Fe^II₂SrMo₁₂O₂₄(OH)₆(H₂O)₈(H₂PO₄)₂(HPO₄)₄(PO₄)₂]路4H₂O 1, (H₂bpp)₂[Co^II₂Sr₂Mo₁₂O₂₄(OH)₆(H₂O)₈(H₂PO₄)₂(HPO₄)₂(PO₄)₄]路6H₂O 2, [(Hpy)(Himi)][Ni(H₂O)₆][Ni₂Sr₂Mo₁₂O₂₄(OH)₆(H₂O)₈(H₂PO₄)₂(HPO₄)₂(PO₄)₄]路4H₂O 3, (H₂imi)₂[Zn₂Sr₂Mo₁₂O₂₄(OH)₆(H₂O)₆(H₂PO₄)₂(HPO₄)₂(PO₄)₄]路3H₂O 4 (imi = imidazole, bpp = 1,3-bi(4-pyridyl)-propane, py = pyridine), have been obtained by hydrothermal methods. These structures were determined by single-crystal X-ray diffraction analysis and were further characterized by elemental analysis, IR, and TG analysis. All the compounds contain the [P₄Mo₆O₃₁]^{12鈭?/sup> (abbreviated as [P₄Mo₆]) polyoxoanions as building blocks, which are further connected into the sandwich-type dimeric units by various transition metal (TM) ions. In compound 1, the dimeric {Fe[P₄Mo₆]₂} units are bonded by an heterometallic {SrFe} binuclear unit to form 1-D string. In compounds 2-4, the dimeric {(TM)[P₄Mo₆]₂} units are linked by new {Sr₂TM} trinuclear fragments into one-dimensional (1-D) chains. All the 1-D chains are further packed into various three-dimensional (3-D) supramolecular assemblies via strong hydrogen-bonding interactions. Furthermore, the electrochemical activities of compounds 1-4 and magnetic properties of compounds 1-3 are reported.}