Unusual spin transition behavior in 2,6-bis((pyrazol-3-yl)-pyridine) iron(II)-bis-oxalato-platinate(II).
[Fe(bpp)2][Pt(ox)2].H2O (with bpp=2,6-bis(pyrazol-3-yl)-pyridine and ox=oxalate) was prepared, and its spin crossover behavior was characterized. The two-step spin transition behavior changes over several cycles. The original behavior is restored when the sample is allowed to relax for a week. Furthermore, the ST exhibits a strong dependence on the heating and cooling rate. Heating the compound at 1 K/min leads to a spin transition with a third step and a second plateau at gammaHS approximately 0.8. Quenching the sample to 77 K also affects the spin transition behavior. The kinetic relaxation is followed after quenching and after light-induced excited spin state trapping experiments.
Grunert
C Matthias
CM
Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Mainz, Staudingerweg 9, D-55099 Mainz, Germany.
Goodwin
Harold A
HA
Carbonera
Chiara
C
Létard
Jean-François
JF
Kusz
Joachim
J
Gütlich
Philipp
P