【摘要】 采用水热合成法,以Nd Cl3·6H2O、Co Cl2·6H2O、2,2’-联吡啶-3,3’-二羧酸(H2bpdc)、氢氧化钠和水为原料合成了一种新型3d-4f金属有机框架晶体材料。该晶体呈红色棒状,经X-射线单晶衍射分析,其结构属单斜晶系,P21/n空间群,化学式为{[Nd2Co(bpdc)3(OH)2(H2O)2]·(H2O)2}n。通过单一变量法确定其最佳合成条件为:n(Nd3+)∶n(Co2+)∶n(bpdc)=1∶1∶1.5,溶于5 m L去离子水,以Na OH调节溶液p H≈5,150℃恒温72 h,降温速度1℃/h。热重分析表明该材料具有良好的热稳定性,在340℃以下可以稳定存在;经循环伏安法测试,此晶体材料具有良好的电化学活性。更多还原

【Abstract】 A new kind of 3d-4f type metal-organic framework has been synthesized by reaction of Nd Cl3·6H2O,Co Cl2·6H2O,2,2’-bipyridyl-3,3’-dicarboxylic acid( H2bpdc),Na OH and H2 O under hydrothermal conditions.The products are rod-like red crystals. A single-crystal X-ray diffraction analysis shows that its chemical formula is{ [Nd2Co( bpdc)3( OH)2( H2O)2]·( H2O)2}nwhich belongs to monoclinic crystal system and P21/ n space group.The optimized synthesis conditions were found to be n( Nd3 +) ∶ n( Co2 +) ∶ n( bpdc) = 1∶ 1∶ 1. 5,5 m LH2O as the solvent,p H 5( adjusted by Na OH),at a temperature of 150 ℃ for 72 h and a cooling rate of 1 ℃ / h. The TG curve shows that this coordination polymer has good thermal stability,and is stable below 340 ℃. Cyclic voltammetry shows that the material is electrochemically active.更多还原