Photo-Induced Spin Transition for an Iron (III) Pyruvic Acid Thiosemicarbazone Compound

Abstract

An iron (III) compound [Fe (thpu) (Hthpu) ] has exhibited spin transition behavior (T1/2↓=225 K and T1/2↓=239 K) with a thermal hysteresis loop (ΔT = 14 K). When the sample has been illuminated at 5 K, an increase in the dc susceptibility was observed. This suggests that the transition from the low-spin state to the high-spin state can be induced by illumination.