Tuning spin transitions of iron(II)-dpp systems

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autoren

  • Dominik Natke
  • D. Unruh
  • B. Dreyer
  • Stephen Klimke
  • Mandy Jahns
  • Annika Preiss
  • Ralf Sindelar
  • G. Klingelhöfer
  • Franz Renz

Organisationseinheiten

Externe Organisationen

  • Johannes Gutenberg-Universität Mainz
  • Hochschule Hannover (HsH)
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Details

OriginalspracheEnglisch
Aufsatznummer12
FachzeitschriftHyperfine Interactions
Jahrgang239
Ausgabenummer1
Frühes Online-Datum30 Jan. 2018
PublikationsstatusVeröffentlicht - 1 Dez. 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.

ASJC Scopus Sachgebiete

Zitieren

Tuning spin transitions of iron(II)-dpp systems. / Natke, Dominik; Unruh, D.; Dreyer, B. et al.
in: Hyperfine Interactions, Jahrgang 239, Nr. 1, 12, 01.12.2018.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Natke, D, Unruh, D, Dreyer, B, Klimke, S, Jahns, M, Preiss, A, Sindelar, R, Klingelhöfer, G & Renz, F 2018, 'Tuning spin transitions of iron(II)-dpp systems', Hyperfine Interactions, Jg. 239, Nr. 1, 12. https://doi.org/10.1007/s10751-017-1486-7
Natke, D., Unruh, D., Dreyer, B., Klimke, S., Jahns, M., Preiss, A., Sindelar, R., Klingelhöfer, G., & Renz, F. (2018). Tuning spin transitions of iron(II)-dpp systems. Hyperfine Interactions, 239(1), Artikel 12. https://doi.org/10.1007/s10751-017-1486-7
Natke D, Unruh D, Dreyer B, Klimke S, Jahns M, Preiss A et al. Tuning spin transitions of iron(II)-dpp systems. Hyperfine Interactions. 2018 Dez 1;239(1):12. Epub 2018 Jan 30. doi: 10.1007/s10751-017-1486-7
Natke, Dominik ; Unruh, D. ; Dreyer, B. et al. / Tuning spin transitions of iron(II)-dpp systems. in: Hyperfine Interactions. 2018 ; Jahrgang 239, Nr. 1.
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title = "Tuning spin transitions of iron(II)-dpp systems",
abstract = "Chemical modifications of the yet reported iron(II) compound [Fe(dpp)2(NCS)2]⋅Py (dpp = dipyrido[3,2a:2{\textquoteright}3{\textquoteright}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 M{\"o}ssbauer 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.",
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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

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JO - Hyperfine Interactions

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