通过水热法合成了三维（3D）网状金属有机框架物[Pr（NTA）（H2O）]n（NTA ＝ nitrilotriacetic acid）；利用元素分析、红外光谱分析、X射线单晶衍射等表征了产物的结构，利用热重分析和示差热重分析评价了其热稳定性，并测定了其磁性能。结果表明，目标配合物的 Pr （Ⅲ）采取九配位模式（N1 O8）形成三帽三角棱柱几何构型，配位聚合物通过O -C-O链组装成高度有序的3D结构。此外，合成的配合物具有较高的热稳定性，并因（O2 C -C-C-CO2）2桥联而显示反铁磁性。%A novel three-dimensional (3D ) metal-organic framework (MOF ) , [Pr (NTA )-(H2 O)]n metal-organic coordination polymer ,was synthesized under hydrothermal condition . As-synthesized MOF was characterized by means of elemental analysis ,infrared spectrometry and single crystal X-ray diffraction .Moreover ,the thermal stability of as-synthesized MOF was evaluated by thermogravimetric analysis and differential thermogravimetric analysis ,and its magnetic properties were also evaluated .It has been found that Pr(Ⅲ) adopts nine-coordi-nated mode of N1 O8 unit to construct a tricapped trigonal prism configuration ,and the coordi-nation polymer is further assembled into highly ordered 3D architecture through O -C-O link-ers .Besides ,as-synthesized MOF is stable at high temperature ,and it presents antiferromag-netic coupling through the (O2 C-C-C-CO2 )2 bridges .
展开▼
