15. Ultrafast Studies of the Light-Induced Spin Change in Fe(II)-Polypyridine Complexes

  1. MALCOLM A. HALCROW
  1. Majed Chergui

Published Online: 18 JAN 2013

DOI: 10.1002/9781118519301.ch15

Spin-Crossover Materials: Properties and Applications

Spin-Crossover Materials: Properties and Applications

How to Cite

Chergui, M. (2013) Ultrafast Studies of the Light-Induced Spin Change in Fe(II)-Polypyridine Complexes, in Spin-Crossover Materials: Properties and Applications (ed M. A. HALCROW), John Wiley & Sons Ltd, Oxford, UK. doi: 10.1002/9781118519301.ch15

Editor Information

  1. School of Chemistry, University of Leeds, UK

Author Information

  1. Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide (LSU), Switzerland

Publication History

  1. Published Online: 18 JAN 2013
  2. Published Print: 15 FEB 2013

ISBN Information

Print ISBN: 9781119998679

Online ISBN: 9781118519301

SEARCH

Keywords:

  • Fe(II) polypyridine complexes;
  • metal-to-ligand-charge-transfer (MLCT) states;
  • photoinduced dynamics;
  • spin photoswitching;
  • ultrafast light-induced spin-crossover (SCO)

Summary

This chapter deals with studies of isolated Fe(II) complexes, mostly in solution. Understanding of photoinduced dynamics in isolated complexes is of importance for description of spin-crossover (SCO) in crystals. The photoswitching of spin of entire domains in such crystals is crucial to understand what occurs at the molecular level. Excellent reviews have appeared that present results of steady-state and time-resolved spectroscopic studies of the SCO process. The chapter focuses on recent developments based on novel ultrafast optical and X-ray techniques, which have led to a new insight into ultrafast SCO phenomenon. It first recalls a number of properties that are common to Fe(II)-based SCO complexes. Then, it concentrates on the excitation into the manifold of singlet metal-to-ligand-charge-transfer (MLCT) states. Combination of cutting-edge ultrafast optical and X-ray spectroscopic tools allows one to retrieve complete photocycle of FeII SCO complexes in solution.