论文部分内容阅读
水热条件下,Ni(NO3)2.6H2O与间硝基苯甲酸(HL=m-NO2C6H4COO)及4,4’-联吡啶(4,4’-bpy)反应形成二维层状聚合物2∞[(NiL2)(4,4’-bpy)4/2]。结构分析表明,Ni(Ⅱ)原子与间硝基苯甲酸配位形成NiL2单元,该单元通过4,4’-联吡啶桥联形成具(44.62)拓扑的二维层状配位聚合物。相邻层与层之间通过间硝基苯甲酸之间的芳环堆积作用形成二重穿插的α-Po拓扑结构。此外变温磁化率显示标题配合物中心Ni原子间存在铁磁耦合作用,最佳拟合结果为g=2,D=79.15 cm-1,J=15.49 cm-1,zJ’=0.34 cm-1,ro=0.78,一致性因子R=8.95×10-3。并通过单晶X-射线衍射分析、元素分析、红外光谱及热重分析对其进行表征。
Hydrothermal conditions, Ni (NO3) 2.6H2O and m-nitrobenzoic acid (HL = m-NO2C6H4COO) and 4,4’-bipyridine (4,4’-bpy) react to form a two-dimensional layered polymer 2 ∞ [(NiL2) (4,4’-bpy) 4/2]. Structural analysis shows that the Ni (Ⅱ) atom is coordinated with m-nitrobenzoic acid to form NiL2 units, which are bridged by 4,4’-dipyridyl to form a two-dimensional layered coordination polymer with (44.62) topology. Adjacent layers and layers through the aromatic ring m-nitrobenzoic acid accumulation between the formation of double interspersed α-Po topology. In addition, the temperature-dependent magnetic susceptibility shows that ferromagnetic coupling exists between the Ni atoms in the title complex. The best fitting results are g = 2, D = 79.15 cm-1, J = 15.49 cm-1 and zJ ’= 0.34 cm- ro = 0.78, concordance factor R = 8.95 × 10-3. And characterized by single crystal X-ray diffraction analysis, elemental analysis, infrared spectroscopy and thermogravimetric analysis.