Coordination polymers containing a pyrazole-based ligand and 4,4′-bipyridine as a spacer: enhancing the family of nonzero-dimensional compounds featuring single-ion magnetic behavior
| Autor: | Patrícia Saraiva Vilas Boas de Almeida, Guilherme P. Guedes, Iuri C. Soares, Henrique C.S. Junior, Glaucio B. Ferreira, Odivaldo C. Alves, Stéphane Soriano |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Ligand Relaxation (NMR) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences 4 4'-Bipyridine Inorganic Chemistry Magnetization chemistry.chemical_compound Crystallography Ferromagnetism chemistry Magnet Materials Chemistry Antiferromagnetism Physical and Theoretical Chemistry 0210 nano-technology Single crystal |
| Zdroj: | Inorganic Chemistry Communications. 121:108201 |
| ISSN: | 1387-7003 |
| Popis: | Two coordination polymers with molecular formula 1∞[M(L)2(4,4′-bipy)(H2O)2], where M stands for CoII (1) or CuII, (2), and L = 5-amino-1-phenyl-1H-pyrazole-4-carboxylate ligand were obtained by slow solvent diffusion and characterized by spectroscopic techniques, single crystal and powder X-ray diffraction, magnetic measurements, and DFT calculations. Magnetic studies carried out for complex 1 showed the key role played by the zero-field splitting and the experimental fit parameters were correlated to CASSCF calculations. Moreover, AC magnetic measurements for 1 revealed a field-induced slow relaxation of the magnetization and a single-ion magnet behavior. For the copper-containing polymer, two kinds of magnetic interactions were observed in the magnetic data and confirmed by using broken-symmetry DFT calculations: (i) ferromagnetic interchain coupling mediated by the hydrogen-bonds and (ii) antiferromagnetic intrachain interaction through the 4,4′-bipy ligand. |
| Databáze: | OpenAIRE |
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