6533b839fe1ef96bd12a670f
RESEARCH PRODUCT
Photomagnetic properties of an Iron(II) low-spin complex with an unusually long-lived metastable LIESST state
Jean-françois LétardJ.p. AderChérif BaldéCédric DesplanchesChiara CarboneraDominique DenuxPhilipp GütlichJosé Sánchez CostaAlain Wattiauxsubject
Coordination sphereSpin states010405 organic chemistryChemistryKineticsCyanideTrappingMacrocyclic Schiff-base ligand[CHIM.MATE]Chemical Sciences/Material chemistryIron complexes010402 general chemistry01 natural sciencesLIESST0104 chemical sciencesInorganic ChemistryCrystallographyComputational chemistryExcited stateMetastabilityLIESSTPhysical and Theoretical ChemistrySpin (physics)description
A comprehensive study of the photomagnetic behavior of the [Fe(L222N5)(CN)2].H2O complex has been carried out. This complex is characterized by a low-spin (LS) iron(II)-metal center up to 400 K and exhibits at 10 K the well-known Light-Induced Excited Spin State Trapping (LIESST) effect. The critical LIESST temperature (T(LIESST)) has been measured to be 105 K. The kinetics of the transition from the metastable high-spin (HS) state to the low-spin state have been determined and used for reproducing the experimental T(LIESST) curve. This study represents a second example of a fully low-spin iron(II)-metal complex up to 400 K, which can be photoexcited at low temperature with an atypical long-lived metastable HS state. This underlines the preponderant role of the inner coordination sphere for stabilizing the lifetime of the photoinduced HS state.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-01-01 |