Syntheses, structures and properties of four 3D microporous lanthanide coordination polymers based on 3,5-pyrazoledicarboxylate and oxalate ligands
| Autor: | Fa-Xin Dong, Huai-Ming Hu, Ganglin Xue, Qing-Ran Wu, Juan Xie, Meng-Lin Yang, Ji-Jiang Wang, Juan Song |
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| Rok vydání: | 2014 |
| Předmět: |
Lanthanide
Chemistry Inorganic chemistry Microporous material Condensed Matter Physics Oxalate Hydrothermal circulation Electronic Optical and Magnetic Materials Inorganic Chemistry Dodecahedron Crystallography chemistry.chemical_compound Materials Chemistry Ceramics and Composites Physical and Theoretical Chemistry Isostructural Monoclinic crystal system Coordination geometry |
| Zdroj: | Journal of Solid State Chemistry. 212:185-190 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2014.01.020 |
| Popis: | Four three-dimensional lanthanide coordination polymers with reversible structural interconversions, [Ln2(Hpdc)2(C2O4)(H2O)4]n·2nH2O [Ln=Sm (1), Eu (2), Tb (3) and Dy (4)], have been synthesized by hydrothermal reactions of lanthanide nitrates with 3,5-pyrazoledicarboxylic (H3pdc) and oxalic acids. It is noteworthy that there is an in situ reaction in 1, in which H3pdc was decomposed into (ox)2− with Cu(II)–Sm(III) synergistic effect under hydrothermal conditions. These compounds are isostructural and crystallized in the monoclinic P21/c space group. The Ln(III) ions are eight-coordinated with dodecahedron coordination geometry. These polyhedra are linked by oxalate groups to form 1D zigzag chain, which are further connected by 3,5-pyrazoledicarboxylate to extend similar 3D frameworks with channels along c-axis in 1–4. These coordination polymers display the characteristic emission bands of the Ln(III) ions in the solid state and possess good thermal stabilities. |
| Databáze: | OpenAIRE |
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