Synthesis, structure and luminescent recognition properties of cerium(IV) coordination polymers based on pyridine-2,6-dicarboxylic acid

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• 作者：Lirong Yang ; Lanzhi Wu ; Huaimin Zhang ; Shuang Song ; Liu Liu ; Mingxue Li
• 关键词：Coordination polymers ; Synthesis ; Structure ; Luminescent recognition properties ; Metal-organic frameworks ; Hydrothermal synthesis
• 刊名：Dyes and Pigments
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：99
• 期：2
• 页码：257-267
• 全文大小：2914 K

文摘

3D coordination polymers of {[Ce2(PDA)3(H2O)3]*0.25(H2O)}n and {[Ce2(PDA)(HPDA)(H2O)5SO4]*2H2O}n, (H2PDA?=?pyridine-2,6-dicarboxylic acid,) have been prepared under hydrothermal conditions and characterized by elemental analyses, IR spectroscopy, thermal analyses and single crystal X-ray diffraction. In the dihydrate polymer the - anions serve as bridges between 1D wavelike chains and the adjacent parallel pyridine rings are connected through ¦Ð-¦Ð interactions. The striking feature of the dihydrate polymer is that 1D nanosized cavities are observed, which house guest water molecules. Weak interaction exists between Ce(IV) center and S atom(Ce¡­S) due to the connection of chelate anion. A magnetic study of the dihydrate polymer confirms that it presents antiferromagnetism. Thermogravimetric and differential thermogravimetric analyses reveal that both polyers are stable at high temperature. Luminescent emissions of complexes demonstrate that they display selectivities towards Zn²⁺, Hg⁺, Pb²⁺ Mn²⁺ and Cd²⁺ or Cu²⁺ ions.