19. Optimizing the Stability of Trapped Metastable Spin States

  1. MALCOLM A. HALCROW
  1. Jean-François Létard,
  2. Guillaume Chastanet,
  3. Philippe Guionneau and
  4. Cedric Desplanches

Published Online: 18 JAN 2013

DOI: 10.1002/9781118519301.ch19

Spin-Crossover Materials: Properties and Applications

Spin-Crossover Materials: Properties and Applications

How to Cite

Létard, J.-F., Chastanet, G., Guionneau, P. and Desplanches, C. (2013) Optimizing the Stability of Trapped Metastable Spin States, in Spin-Crossover Materials: Properties and Applications (ed M. A. HALCROW), John Wiley & Sons Ltd, Oxford, UK. doi: 10.1002/9781118519301.ch19

Editor Information

  1. School of Chemistry, University of Leeds, UK

Author Information

  1. CNRS, Université de Bordeaux, ICMCB, France

Publication History

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

ISBN Information

Print ISBN: 9781119998679

Online ISBN: 9781118519301

SEARCH

Keywords:

  • iron(II) SCO materials;
  • light-induced excited spin-state trapping (LIESST);
  • metastable states;
  • optical switches;
  • polynuclear complexes;
  • spin-crossover (SCO) materials;
  • T(LIESST) approach

Summary

This chapter focuses on light-induced excited spin-state trapping (LIESST) encountered in iron(II) spin-crossover complexes, which is of major interest for the design of optical switches. It is organized into four sections. The first section recalls background considerations on LIESST effect and on the various strategies used to compare photomagnetic properties of iron(II) SCO materials, including inverse energy gap law introduced by Hauser. It introduces the T(LIESST) procedure used to compare the photomagnetic properties of SCO materials. The second section reports linear relationship between T(LIESST) and thermal spin-transition (T1/2) temperature, and the work done over the past ten years to identify the parameters affecting the T0 factor. The third section considers T(LIESST) measurements of polynuclear iron(II) SCO materials, particularly binuclear SCO complexes with antiferromagnetic coupling. The fourth and final section reports simulation of T(LIESST) curves for mono- and binuclear SCO material.