Département de chimie moléculaire

Single crystals of the {\{}FeII(pyrazine)[Pt(CN)4]{\}} spin crossover complex were synthesized by a slow diffusion method. The crystals exhibit a thermal spin transition around room temperature (298 K), which is accompanied by a 14 K wide hysteresis loop. X-ray single-crystal anal. confirms that this compound crystallizes in the tetragonal P4/mmm space group in both spin states. Within the thermal hysteresis region a complete bidirectional photoconversion was induced between the two phases (high spin ⇄ low spin) when a short single laser pulse (4 ns, 532 nm) was shined on the sample.