Weak cooperativity in selected iron(II) 1D coordination polymers
| Autor: | Aurelian Rotaru, Marinela M. Dîrtu, Anil D. Naik, Damien Gillard, Yann Garcia |
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| Rok vydání: | 2011 |
| Předmět: |
Nuclear and High Energy Physics
Thermochromism Spin states Ligand Chemistry Inorganic chemistry Supramolecular chemistry Spin transition Cooperativity Condensed Matter Physics Magnetic susceptibility Atomic and Molecular Physics and Optics Crystallography Spin crossover Physical and Theoretical Chemistry |
| Zdroj: | Hyperfine Interactions. 205:75-79 |
| ISSN: | 1572-9540 0304-3843 |
| DOI: | 10.1007/s10751-011-0412-7 |
| Popis: | The spin crossover behaviour of a new class of FeII coordination polymers [Fe(phtptrz)3]I2 (1), [Fe(phtptrz)3](ReO4)2•CH3OH (2) and [Fe(phtptrz)3]TaF7•6H2O (3) based on a novel ligand 4-(3′ -N-phtalimido-propyl)-1,2,4-triazole (phtptrz), were investigated by temperature dependent 57Fe Mossbauer spectroscopy and magnetic susceptibility measurements. The adverse effect of bulky substituent on 1,2,4-triazole, favorable supramolecular interactions and influence of increasing anion size on spin crossover profile is discussed. 1 and 2 show thermally induced spin conversions of gradual and incomplete nature with associated thermochromism, and transition temperatures T1/2 ~ 163 K and 137 K, respectively. A spin state crossover is also identified for 3. |
| Databáze: | OpenAIRE |
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