Abstract
High spin (HS) ⇌ low spin (LS) conversions in transition metal complexes are nonradiative transitions between spin states. In this contribution, we present a study of the temperature and pressure dependence of the HS ⇌ LS intersystem crossing dynamics. For some iron(II) spin-crossover complexes, the rate constants were determined by line shape analysis of57Fe Mössbauer spectra. Their temperature dependence is described by an Arrhenius equation, their pressure dependence is interpreted within absolute rate theory. HS → LS conversion rates at low temperatures were determined from the relaxation of light-induced formation of HS states, monitored by optical spectroscopy. Deviations from a simple Arrhenius behaviour due to cooperative effects were found for one complex, low temperature tunnelling is observed for another.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
P. Gütlich, Struct. Bonding (Berlin) 44(1981)83.
E. König, G. Ritter and S.K. Kulshreshta, Chem. Rev. 85(1985)219.
H. Spiering, E. Meissner, H. Köppen, E.W. Müller and P. Gütlich, Chem. Phys. 68(1982)65.
N. Willenbacher and H. Spiering, J. Phys. C21(1988)1423.
P. Adler, H. Spiering and P. Gütlich, Inorg. Chem. 26(1987)3840.
P. Adler, H. Spiering and P. Gütlich, Hyp. Int. 42(1988)1035.
S. Decurtins, P. Gütlich, K.M. Hasselbach, A. Hauser and H. Spiering, Inorg. Chem. 24 (1985)2174.
A. Hauser, P. Gütlich and H. Spiering, Inorg. Chem. 25(1986)4245.
P. Adler, H. Spiering and P. Gütlich, J. Phys. Chem. Solids, submitted.
M. Blume, Phys. Rev. 174(1968)351.
S. Decurtins, P. Gütlich, C.P. Köhler and H. Spiering, J. Chem. Soc., Chem. Commun. (1985)430.
S. Decurtins, P. Gütlich, C.P. Köhler, H. Spiering and A. Hauser, Chem. Phys. Lett. 05 (1984)1.
A. Hauser, Chem. Phys. Lett. 124(1986)543.
L. Wiehl, K. Knorr, H. Spiering and P. Gütlich, in preparation.
A. Vef et al., to be published.
J.K. Beattie, R.A. Binstead and R.J. West, J. Amer. Chem. Soc. 100(1978)3044.
J.J. McGarvey, I. Lawthers, K. Heremans and H. Toftlund, J. Chem. Soc., Chem. Commun. (1984)1575.
J. DiBenedetto, V. Arkle, H.A. Goodwin and C.P. Ford, Inorg. Chem. 24(1985)456.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Adler, P., Hauser, A., Vef, A. et al. Dynamics of spin state conversion processes in the solid state. Hyperfine Interact 47, 343–356 (1989). https://doi.org/10.1007/BF02351617
Issue Date:
DOI: https://doi.org/10.1007/BF02351617