Syntheses, structures and properties of 3D inorganic-organic hybrid frameworks constructed from lanthanide polymer and Keggin-type tungstosilicate |
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| Authors: | Yuanzhe Gao Yanqing Xu Zhangang Han Chunhong Li Yingnan Chi |
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| Institution: | a Department of Chemistry, The Institute for Chemical Physics and State Key Laboratory of Explosion Science Technology, Beijing Institute of Technology, Beijing 100081, China
b College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, Hebei 050016, China |
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| Abstract: | Inorganic-organic hybrid frameworks, namely Ce(H2O)3(pdc)]4SiW12O40]·6H2O 1, M(H2O)4(pdc)]4SiW12O40]·2H2O (M=Ce for 2a, La for 2b, Nd for 2c; H2pdc=pyridine-2,6-dicarboxylic acid) were assembled through incorporation of Keggin-type heteropolyanion SiW12O40]4− within the voids of lanthanides-pdc network as pillars or guests under hydrothermal condition. Single-crystal X-ray analyses of these crystals reveal that compound 1 presents 3D pillar-layered framework with the SiW12O40]4− anions located on the square voids of the two-dimensional Ce-pdc bilayer. Compounds 2a-c are isostructural and constructed from 3D Ln-pdc-based metal-organic framework (MOF) incorporating noncoordinating guests Keggin structure SiW12O40]4−. Solid-state properties of compounds 1 and 2a-c such as thermal stability and photoluminescence have been further investigated. |
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| Keywords: | Polyoxometalates Lanthanide polymer Hydrothermal synthesis Thermal stability Photoluminescence |
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