A series of rare earth coordination polymer constructed from paddle-wheel building blocks  

作　　者：郭广生 刘阳春 张佳 郭洪猷 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology

出　　处：《Journal of Rare Earths》2008年第5期633-637,共5页稀土学报（英文版）

基　　金：the National Natural Science Foundation of China (20571007)

摘　　要：Three coordination polymers, Ln2（bpdc）3（phen）2（H2O）2 （Ln=Nd（1）, Eu（2）, and Tb （3）; bpdc=2,2＇-bipyridine-3,3＇-dicarboxylate; phen=1,10-phenanthroline）, were obtained by hydrothermal reaction of Ln2O3 with 2,2＇-bipyridine-3,3＇-dicarboxylate acid, and 1,10-phe- nanthroline. They were characterized by single-crystal X-ray diffraction, IR spectra, and photoluminescent spectra. The crystallographic data of 1-3 indicated that they were isostructural. Both complexes contained paddle-wheel building blocks, formed by bpdc and phen ligands. These paddle-wheel secondary building units （SBUs） were further connected to form two-dimensional （2-D） metal organic framework （MOF） networks by 2,2＇-bipyridine-3, and 3＇-dicarboxylate tinkers. A three-dimensional （3-D） supramolecular structure was formed by π-π aromatic interactions between adjacent 2-D infinite networks. Photoluminescent measurements indicated that europium compound 2 and terbium compound 3 were strong, red and green emitters, respectively.Three coordination polymers, Ln2（bpdc）3（phen）2（H2O）2 （Ln=Nd（1）, Eu（2）, and Tb （3）; bpdc=2,2＇-bipyridine-3,3＇-dicarboxylate; phen=1,10-phenanthroline）, were obtained by hydrothermal reaction of Ln2O3 with 2,2＇-bipyridine-3,3＇-dicarboxylate acid, and 1,10-phe- nanthroline. They were characterized by single-crystal X-ray diffraction, IR spectra, and photoluminescent spectra. The crystallographic data of 1-3 indicated that they were isostructural. Both complexes contained paddle-wheel building blocks, formed by bpdc and phen ligands. These paddle-wheel secondary building units （SBUs） were further connected to form two-dimensional （2-D） metal organic framework （MOF） networks by 2,2＇-bipyridine-3, and 3＇-dicarboxylate tinkers. A three-dimensional （3-D） supramolecular structure was formed by π-π aromatic interactions between adjacent 2-D infinite networks. Photoluminescent measurements indicated that europium compound 2 and terbium compound 3 were strong, red and green emitters, respectively.

关 键 词：hydrothermal reaction coordination polymer X-ray diffraction PHOTOLUMINESCENCE rare earths 

分 类 号：TB302[一般工业技术—材料科学与工程]