A new family of 3D 3d–4f heterometallic frameworks comprising 1D inorganic lanthanide ladders and organic CuI-bipyridine chains
| Autor: | Qi-Bing Bo, Zhong-Xi Sun, Willis Forsling |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Lanthanide
chemistry.chemical_classification Gadolinium Inorganic chemistry chemistry.chemical_element General Chemistry Polymer Condensed Matter Physics Fluorescence Thermogravimetry Crystallography Bipyridine chemistry.chemical_compound chemistry Differential thermal analysis General Materials Science Single crystal |
| Zdroj: | CrystEngComm. 10:232-238 |
| ISSN: | 1466-8033 |
| Popis: | A new family of the 3D heterometallic coordination polymers [{Ln2(SO4)2(H2O)2(pydc)2Cu2 (bpy)2·2(H2O)}]n (Ln = Sm (1), Eu (2), Gd (3), Tb (4) and Dy (5); pydc = 2,6-pyridine-dicarboxylate anion; bpy= 4,4′-bipyridine) have successfully been synthesized under solvothermal conditions (H2O/ethanol). All the coordination polymers obtained were characterized by elemental analysis, FT-IR analysis, differential thermal analysis/thermogravimetry (DTA/TG), fluorescent spectra and single crystal X-ray diffraction analysis. The most intriguing structural feature is that all the compounds exhibit 3D frameworks with 1D inorganic lanthanide ladders and organic CuI-bipyridine chains, which represent two types of 3d/4f coordination polymers (form I: Ln = Sm and Eu; form II: Ln = Gd, Tb and Dy) as the result of a so-called “gadolinium break effect”. Additionally, compounds 2 and 4 showed the characteristic emission spectra of the EuIII and TbIII ions, respectively, and appeared to have good fluorescence properties, while 1, 3 and 5 emitted fluorescence resembling CuI complexes. To our knowledge, the investigation of the effect of mixed ligands on the assembly of LnIII-CuI metal-based polymers has not been reported so far. |
| Databáze: | OpenAIRE |
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