Details
| Original language | English |
|---|---|
| Article number | 12 |
| Journal | Hyperfine Interactions |
| Volume | 239 |
| Issue number | 1 |
| Early online date | 30 Jan 2018 |
| Publication status | Published - 1 Dec 2018 |
Abstract
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 Mössbauer 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.
Keywords
- dpp, Hysteresis, Iron complexes, Mössbauer spectroscopy, Spin crossover
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Hyperfine Interactions, Vol. 239, No. 1, 12, 01.12.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Tuning spin transitions of iron(II)-dpp systems
AU - Natke, Dominik
AU - Unruh, D.
AU - Dreyer, B.
AU - Klimke, Stephen
AU - Jahns, Mandy
AU - Preiss, Annika
AU - Sindelar, Ralf
AU - Klingelhöfer, G.
AU - Renz, Franz
N1 - Funding information: The authors would like to thank and acknowledge financial support from Hannover School for Nanotechnology (hsn), Leibniz Universität Hannover (LUH), Laboratory of Nano and Quantum Engineering (LNQE) and Hochschule Hannover (HsH).
PY - 2018/12/1
Y1 - 2018/12/1
N2 - 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 Mössbauer 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.
AB - 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 Mössbauer 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.
KW - dpp
KW - Hysteresis
KW - Iron complexes
KW - Mössbauer spectroscopy
KW - Spin crossover
UR - http://www.scopus.com/inward/record.url?scp=85041580584&partnerID=8YFLogxK
U2 - 10.1007/s10751-017-1486-7
DO - 10.1007/s10751-017-1486-7
M3 - Article
AN - SCOPUS:85041580584
VL - 239
JO - Hyperfine Interactions
JF - Hyperfine Interactions
SN - 0304-3843
IS - 1
M1 - 12
ER -