| Summary: | 碩士 === 國立成功大學 === 化學系碩博士班 === 96 === A series of lanthanide-based coordination polymers incorpo rating the 4,4’-oxybisbenzoate (OBA) ligands have been synthesized. These compounds are labeled as YbOBA-1,YbOBA-2, YbOBA-3, YbOBA-4, NdOBA-5 and GdOBA-6 according to their versatile structures. For YbOBA-1 to -3, the Yb3+
ions are assembled with the OBA ligands to form three distinct two-dimensional networks, respectively. For YbOBA-4, the Yb3+ ions are assembled with theOBA ligands to form a three-dimensional porous framework where the Na+ ions are distributed in the channels. The analogous compounds by the Er3+,Gd3+,Eu3+,Tb3+ and Nd3+ ions posses the same frameworks as that in YbOBA-4. The porous framework in YbOBA-4 was maintained until 250oC, as indicated by
the well crystalline of dehydrate phase of Na[Yb(OBA)2]. As the Na+ ions replaced by the K+ ions, another porous framework of NdOBA-5 is formed. Particularly,this frame work contains trinuclear neodymium units with the neighbor ing Nd-Nd distance of 4.1102(4) Å and angle of Nd—N1—Nd: 176.5 o. Further,the K+ ions induces a new porous framework of GdOBA-6.
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