Tuning spin transitions of iron(II)-dpp systems
| Autor: | Dominik Natke, Ralf Sindelar, Franz Renz, B. Dreyer, Daniel Unruh, Göstar Klingelhöfer, Moritz Jahns, Stephen Klimke, A. Preiss |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Thiocyanate Spin states 010405 organic chemistry Phenazine Infrared spectroscopy 010402 general chemistry Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry.chemical_compound Crystallography chemistry Spin crossover Mössbauer spectroscopy Condensed Matter::Strongly Correlated Electrons Physical and Theoretical Chemistry Spin (physics) Spectroscopy |
| Zdroj: | Hyperfine Interactions. 239 |
| ISSN: | 1572-9540 0304-3843 |
| DOI: | 10.1007/s10751-017-1486-7 |
| Popis: | Chemical modifications of the yet reported iron(II) compound [Fe(dpp)2(NCS)2]⋅Py (dpp = dipyrido[3,2a:2’3’c]phenazine, Py = pyridine) which shows abrupt spin crossover below room temperature with large hysteresis have been made. The purpose was to stabilize different spin states at room temperature as well as to adjust the spin crossover in temperature and hysteresis width. We modified the bidentate ligand dpp by substituting hydrogens at the phenazine by different functional groups. In addition, we substituted the thiocyanate monodentate ligands by NCSe−. The spin states of these compounds have been investigated by Mossbauer spectroscopy at two temperatures and temperature depending IR spectroscopy. These methods indicating that the chemical modifications are influencing the observed spin configuration of the complexes alongside the spin crossover behavior which changed to gradual and incomplete transitions. These promising results offer interesting possibilities for chemical adjustments of the shown spin crossover systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink