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Book chapter
English

Light-induced spin crossover and the high-spin→low-spin relaxation

ContributorsHauser, Andreas
PublisherBerlin : Springer
Publication date2004
Abstract

The discovery of a light-induced spin transition at cryogenic temperatures in a series of iron(II) spin-crossover compounds in 1984 has had an enormous impact on spin-crossover research. Apart from being an interesting photophysical phenomenon in its own right, it provided the means of studying the dynamics of the intersystem crossing process between the high-spin and the low-spin state in a series of compounds and over a large temperature range. It could thus be firmly established that intersystem crossing in spin-crossover compounds is a tunnelling process, with a limiting low-temperature lifetime below 50 K and a thermally activated region above 100 K. This review begins with an elucidation of the mechanism of the light-induced spin transition, followed by an in depth discussion of the chemical and physical factors, including cooperative effects, governing the lifetimes of the light-induced metastable states.

Keywords
  • Thermal and light-induced spin crossover
  • High-spinrarrlow-spin relaxation
  • Intersystem crossing
  • External pressure
  • Chemical pressure
  • Cooperative effects
  • Iron(II) complexes
Citation (ISO format)
HAUSER, Andreas. Light-induced spin crossover and the high-spin→low-spin relaxation. In: Topics in current chemistry. Vol. 234 : spin crossover in transition metal compounds II. Berlin : Springer, 2004. p. 786. doi: 10.1007/b95416
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