论文部分内容阅读
通过水热合成法合成了一个新的夹心型钼磷酸基“三明治”状有机-无机杂化化合物[C3N2H5]2[C7NH10]2{Mn[Mo6O12(OH)3(PO4)(H2PO4)3]2}[C5NH5]4·2H2O(化合物1),并对其进行元素分析、红外光谱、热重分析和X射线单晶衍射表征。单晶结构解析表明,该化合物属于正交晶系,Pbca空间群,晶胞参数a=1.697 74(17)nm,b=2.043 8(2)nm,c=2.504 7(3)nm,α=90°,β=90°,γ=90°,V=8.690 8(15)nm3,Z=4。化合物1中的夹心结构阴离子是由2个{Mn[Mo6O12(OH)3(PO4)(H2PO4)3]2}建筑单元通过1个八面体配位的金属Mn2+离子键连形成。化合物[C3N2H5]2[C7NH10]2{Mn[Mo6O12(OH)3(PO4)(H2PO4)3]2}[C5NH5]4·2H2O中,具有夹心结构的Mn(P4Mo6)2与质子化的咪唑、N-乙基吡啶、吡啶及水分子通过氢键连接形成超分子化合物。室温固态荧光光谱分析表明,该化合物在437nm处具有较强的荧光发射。化合物1的合成表明溶剂在多金属氧酸盐的合成中起到了重要的作用。
A new sandwich type molybdophosphate “sandwich” organic-inorganic hybrid compound [C3N2H5] 2 [C7NH10] 2 {Mn [Mo6O12 (OH) 3 (PO4) (H2PO4) 3 ] 2} [C5NH5] 4 · 2H2O (compound 1), and its elemental analysis, infrared spectroscopy, thermogravimetric analysis and X-ray single crystal diffraction characterization. The crystal structure analysis of the single crystal shows that the compound belongs to the orthorhombic, Pbca space group with the unit cell parameters a = 1.697 74 (17) nm, b = 2.043 8 (2) nm and c = 2.504 7 90 °, β = 90 °, γ = 90 °, V = 8.690 8 (15) nm3, Z = 4. The sandwich structure anion in compound 1 is formed by the bonding of two Mn2 + ions with one octahedral coordination structure in the building unit of {Mn [Mo6O12 (OH) 3 (PO4) (H2PO4) 3] 2} Mn (P4Mo6) 2 having a sandwich structure in the compound [C3N2H5] 2 [C7NH10] 2 {Mn [Mo6O12 (OH) 3 (PO4) (H2PO4) 3] 2} [C5NH5] 4 · 2H2O and protonated imidazole, N-ethyl pyridine, pyridine and water molecules by hydrogen bonds to form supramolecular compounds. Solid-state fluorescence spectroscopy at room temperature showed that the compound has strong fluorescence emission at 437 nm. The synthesis of compound 1 shows that the solvent plays an important role in the synthesis of polyoxometalates.