摘要
A novel porous lanthanide-organic coordination polymer, [Nd（H2O）（HnicO）（TP）]·2H2O （1） （H2nicO=2-hydroxynicotinic acid, TP= terephthalate）, was prepared under hydrothermal condition and characterized by single-crystal X-ray diffraction, thermogravimetric analysis and infrared spectroscopy. Compound 1 exhibited a flexible coordination geometry of lanthanide ions, which possessed a three-dimensional （3D） open framework with one-dimensional （1D） channels containing lattice water molecules. This framework structure exhibited a high stability up to 330℃ after removing free water molecules. A homometallic supramolecular framework （Zn（HnicO）2（H2O）2 （2）） was obtained due to the competitive reaction between organic ligands, Nd3＋ and Zn2＋ ions. The results showed that on the basis of the soft-hard/acid-base principle the coordination selection between metal ions and organic ligands played an essential role in the smart construction of lanthanide architectures.
A novel porous lanthanide-organic coordination polymer, [Nd（H2O）（HnicO）（TP）]·2H2O （1） （H2nicO=2-hydroxynicotinic acid, TP= terephthalate）, was prepared under hydrothermal condition and characterized by single-crystal X-ray diffraction, thermogravimetric analysis and infrared spectroscopy. Compound 1 exhibited a flexible coordination geometry of lanthanide ions, which possessed a three-dimensional （3D） open framework with one-dimensional （1D） channels containing lattice water molecules. This framework structure exhibited a high stability up to 330℃ after removing free water molecules. A homometallic supramolecular framework （Zn（HnicO）2（H2O）2 （2）） was obtained due to the competitive reaction between organic ligands, Nd3＋ and Zn2＋ ions. The results showed that on the basis of the soft-hard/acid-base principle the coordination selection between metal ions and organic ligands played an essential role in the smart construction of lanthanide architectures.
基金
Program for New Century Excellent Talents in University (NCET-05-0278)
the National Natural Science Foundation of China (50872016)
the Foundation for the Author of National Excellent Doctoral Dissertation of China (200322)
