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  4. Lanthanide Complex [Nd(dpdo)4(H2O)3][ClO4]3·4.5H2O·dpdo Containing Framework Based on 4,4′-Dipyradine-Dioxide

稀土学报(英文版), 2002, 20(4): 313-317.

马宝清 1, , 孙豪岭 2, , 高松 3,

1.State Key Laboratory of Rare Earth Materials Chemistry and Appl ications & PKU-HKU JointLaboratory on Rare Earth Materials and Bioinorganic C h emistry, College of Chemistry and Molecular Engineering, Peking University, Beij ing 100871, China

2.State Key Laboratory of Rare Earth Materials Chemistry and Appl ications & PKU-HKU JointLaboratory on Rare Earth Materials and Bioinorganic C h emistry, College of Chemistry and Molecular Engineering, Peking University, Beij ing 100871, China

3.State Key Laboratory of Rare Earth Materials Chemistry and Appl ications & PKU-HKU JointLaboratory on Rare Earth Materials and Bioinorganic C h emistry, College of Chemistry and Molecular Engineering, Peking University, Beij ing 100871, China

基金项目:   国家重点基础研究发展计划(973计划)(G1998061305)   the National Natural Science Foundation of China(20023005,29831010)  

Lanthanide Complex [Nd(dpdo)4(H2O)3][ClO4]3·4.5H2O·dpdo Containing Framework Based on 4,4′-Dipyradine-Dioxide

Keywords： rare earths

A novel lanthanide coordination polymer formulated as [Nd(dpdo)4(H2O)3] [ClO4]3*4.5H2O*dpdo 1(dpdo=4,4′-dipyrazine-dioxide) was synthesized and structurally characterized. The Nd3+ ions are bridged by dpdo ligands in a cis-mode to form a zigzag chain along [001] direction. Meanwhile, each N d3+ ion is coordinated with three terminal dpdo molecules. One of them is overlapped with the bridging one through π-π stackings, and the other two are bound to the opposite directions of the bridging ones, producing a ribbon-like motif with rectangular cavity. These adjacent ribbons are connected through int er-molecular π-π stackings to give parquet-like architecture with a large re ctangular channel (1.108 nm×1.660 nm) in which the crystal lattice water molecu les and ClO4- anions are included. Thermal analysis shows that the solvate d pdo and water molecules can be removed at lower temperature, while coordinated d pdo molecules are lost simultaneously at higher temperature.

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