Effects of Both Methyl and Pyrimidine Groups in Fe–Ag Spin-Crossover Hofmann-Type Complex {Fe(4-Methylpyrimidine)2[Ag(CN)2]2}
| Autor: | Takafumi Kitazawa, Kosuke Kitase, Daisuke Akahoshi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Pyrimidine
010405 organic chemistry Chemistry Spin transition Type (model theory) 010402 general chemistry 01 natural sciences 0104 chemical sciences Inorganic Chemistry Crystallography chemistry.chemical_compound Hysteresis Spin crossover Mössbauer spectroscopy Physical and Theoretical Chemistry Relativistic quantum chemistry |
| Zdroj: | Inorganic Chemistry. 60:4717-4722 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/acs.inorgchem.0c03655 |
| Popis: | The spin-crossover (SCO) phenomenon is an active area of research. This paper describes the synthesis of an Fe-Ag Hofmann-type complex, {Fe(4-methylpyrimidine)2[Ag(CN)2]2}, which demonstrates a one-step SCO and single-layer Hofmann-type structure with Ag-N interactions and no Ag-Ag interactions, which is strikingly different from the previously synthesized complex {Fe(4-methylpyrimidine)2[Au(CN)2]2} that contains Au-Au interactions and no Au-N interactions. This difference can be explained in terms of the lack of relativistic effect in the Ag atoms and the different cooperative effects caused by their different structures. A scan-rate-dependent hysteresis is observed using magnetic measurement whereas not using 57Fe Mossbauer spectroscopy, suggesting that the spin transition is relatively slow. |
| Databáze: | OpenAIRE |
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