Correlations of the distribution of spin states in spin crossover compounds

Photoexcitation in the Spin-Crossover Compound [Fe(pic)3]Cl2·EtOH (pic = 2-Picolylamine)

“…On the basis of previous publications on the thermal spin transition 2,3,21 as well as on the photophysical properties 8 of [Fe-(pic) 3 ]Cl 2 ‚EtOH, the results presented in this article lead to a quantitative, comprehensive, and consistent understanding of the various aspects of light-induced excited spin state trapping in this compound. In conclusion, all observations can be interpreted on the basis of comparatively simple and wellestablished theoretical concepts.…”

Pressure-induced two-step spin transition with structural symmetry breaking: X-ray diffraction, magnetic, and Raman studies

“…57 These authors were also the first to predict the establishment of a "chessboard structure" in the IP. 58 The interesting feature of their model is that it takes into account explicitly the temperature and pressure dependence of the relevant properties of the crystal lattice. For example, through the volume dependence of the bulk modulus, it was possible to simulate the anomalous increase of the hysteresis width.…”

Symmetry Breaking in Iron(II) Spin-Crossover Molecular Crystals

“…Contrary to expectations, the average metal-to-ligand bond length of the [FeN4O2] coordination center is virtually the same for the HS and the IP states and only 0.1 Å larger than that observed for the LS state at 103 K. Consequently, no crystallographic evidence of IP with an ordering •••HS-LS••• was afforded for this complex. This problem was reinvestigated by Gütlich et al but no clear conclusion was achieved [32]. The multicomponent mononuclear complex [Fe II (dpp) 2 ][Ni(mnt) 2 ] 2¨M eNO 2 , (dpp = 2,6-bis (pyrazol-1-yl)pyridine (see Figure A1) and mnt = maleonitriledithiolate) displays a complicated SCO behavior.…”