基于一维[H_2Mo_4O_(14)]_n~(2n-)链和双吡啶双酰胺配体的三维锌配合物的合成、结构与性能

选择柔性的双吡啶双酰胺配体N,N'-双(3-吡啶甲酰胺基)-1,2-乙烷(3-bpye)、钼酸铵和氯化锌在水热条件下自组装制备了一个基于一维[H_2Mo_4O_(14)]_n~(2n-)链的三维锌配合物[Zn(3-bpye)(H_2Mo_4O_(14))(H_2O)_2],并通过元素分析、红外光谱、热重分析等技术手段研究了配合物的结构,并利用X射线单晶衍射分析进行了晶体结构表征。结构解析揭示标题配合物是三斜晶系,P-1空间群,晶胞参数a=0.61310(3)nm,b=1.04750(6)nm,c=1.06540(6)nm,α=78.5540(10)°,β=77.5350(10)°,γ=89.9050(10)°,V=0.65420(6)nm~3,M_r=981.47,D_c=2.491 g/cm~3,Z=1,F(000)=468,R_1=0.0290,ωR_2=0.1068。标题配合物中,金属锌离子连接一维[H_2Mo_4O_(14)]_n~(2n-)链形成一种二维无机双金属层[Zn(H_2Mo_4O_(14))]_n,相邻的层间又通过双齿配体3-bpye连接形成三维CdSO_4拓扑的骨架结构。配合物表现出强的荧光发射特性,而且其在紫外光照下对亚甲基蓝和罗丹明B均有明显的催化降解活性。

A Three-Dimensional Zinc Compound Based on One-Dimensional [H2Mo4O14]n2n- Chain and Bis(pyridyl)-Bis(amide) Ligand: Synthesis,Structure and Property

A three-dimensional(3D) zinc compound [Zn(3-bpye)(H₂Mo₄O₁₄)(H₂O)₂](3-bpye=N,N'-bis(3-pyridinecarboxamide)-1,2-ethane) based on one-dimensional(1D) [H₂Mo₄O₁₄]_n^2n- chain was hydrothermally prepared by bis(pyridyl)-bis(amide) ligand, ammonium molybdate and zinc chloride. Structural analysis by element analysis, indrared(IR) spectroscopy, thermogravity(TG) and X-ray single-crystal diffraction(XRD) reveal that the title compound is triclinic system with P-1 space group. Its cell parameters are a=0.61310(3) nm, b=1.04750(6) nm, c=1.06540(6) nm, α=78.5540(10)°, β=77.5350(10)°, γ=89.9050(10)°, V=0.65420(6) nm³, M_r=981.47, D_c=2.491 g/cm³, Z=1, F(000)=468, R₁=0.0290, ωR₂=0.1068. In the title compound, 1D [H₂Mo₄O₁₄]_n^2n- chains are linked by the Zn²⁺ ions to form 2D inorganic bimetallic layer [Zn(H₂Mo₄O₁₄)]_n. The adjacent 2D layers are further connected by the bridging ligands 3-bpye to construct 3D framework with CdSO₄ topology. This zinc compound possesses strong fluorescence emission. Moreover, this compound shows remarkable photocatalytic activities for the degradation of methylene blue and rhodamine B under ultraviolet irradiation. CCDC: 1493115.