ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The intersystem crossing rates from the high-spin (5T2) to the low-spin (1A1) state in the spin–crossover systems [M:Fe(pic)3]Cl2⋅Sol, M=Zn or Mn, Sol=MeOH or EtOH have been measured in the temperature range between 5 and 170 K. Within the series of investigated compounds, the low-temperature rates are strongly correlated to the transition temperatures T1/2 of the thermal transition. The temperature dependence of the relaxation rates can only be understood in terms of a nonadiabatic multimode multiphonon process involving lattice vibrations. The relaxation rates are controlled by the zero point energy difference ΔE0, the Huang–Rhys parameters Siop and Sak for intramolecular and lattice vibrations, respectively, and the frequencies ωi of the intramolecular vibrations. © 1994 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.467962
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