7. Valence Tautomeric Transitions in Cobalt-dioxolene Complexes

  1. MALCOLM A. HALCROW
  1. Colette Boskovic

Published Online: 18 JAN 2013

DOI: 10.1002/9781118519301.ch7

Spin-Crossover Materials: Properties and Applications

Spin-Crossover Materials: Properties and Applications

How to Cite

Boskovic, C. (2013) Valence Tautomeric Transitions in Cobalt-dioxolene Complexes, in Spin-Crossover Materials: Properties and Applications (ed M. A. HALCROW), John Wiley & Sons Ltd, Oxford, UK. doi: 10.1002/9781118519301.ch7

Editor Information

  1. School of Chemistry, University of Leeds, UK

Author Information

  1. School of Chemistry, University of Melbourne, Australia

Publication History

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

ISBN Information

Print ISBN: 9781119998679

Online ISBN: 9781118519301

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Keywords:

  • bifunctional VT complexes;
  • cobalt-dioxolene complexes;
  • induction;
  • polynuclear VT complexes;
  • valence tautomeric (VT) transitions

Summary

This chapter reviews recent advances that relate to valence tautomeric (VT) transitions in cobalt-dioxolene complexes. It begins with a discussion on the induction of VT transitions, including thermally induced, pressure induced, light induced, magnetic field induced, and x-ray induced VT transitions. It also explains other factors that contribute to the VT transition, namely, ancillary ligand effects, counterion and solvation effects, and cooperativity. The chapter finally presents discussions on polynuclear VT complexes (dinuclear VT complexes and polymeric VT complexes) and bifunctional VT complexes. Although crystal packing and intermolecular interactions remain essentially beyond the control of the synthetic chemist, serendipity has afforded several compounds where cooperativity resulting from intermolecular interactions has given rise to the two properties identified as essential for functional molecular materials based on VT transitions. These are room temperature bistability with wide hysteresis and very long-lived accessible metastable states.