A series of rare earth coordination polymer constructed from paddle-wheel building blocks
来源期刊：JOURNAL OF RARE EARTHS2008年第5期
论文作者：GUO Guangsheng LIU Yangchun GUO Hongyou ZHANG Jia
Key words：hydrothermal reaction; coordination polymer; X-ray diffraction; photoluminescence; rare earths;
Abstract: Three coordination polymers, Ln2(bpdc)3(phen)2(H2O)2 (Ln=Nd(1), Eu(2), and Tb (3); bpdc=2,2'-bipyddine-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 linkers. 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.
GUO Guangsheng1，LIU Yangchun1，GUO Hongyou1，ZHANG Jia1
(1.State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beifing 100029,China)
Abstract:Three coordination polymers, Ln2(bpdc)3(phen)2(H2O)2 (Ln=Nd(1), Eu(2), and Tb (3); bpdc=2,2''-bipyddine-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 linkers. 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.
Key words:hydrothermal reaction; coordination polymer; X-ray diffraction; photoluminescence; rare earths;
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