Spin Crossover and Valence Tautomerism: Symmetry Aspects
A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Chemistry: Symmetry/Asymmetry".
Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 1992
Special Issue Editors
Interests: valent tautomeric (redox-isomeric) complexes of transition metals; synthesis, structures, properties; valent tautomeric (VT) transformations, parameters, hysteresis, phase transitions, thermodymanics; potential applications of VT complexes, electrical conductivity, sensors, etc.; photo-/thermomechanical effect on the crystals of o-semiquinonato-complexes of transition metals; crystal growth, structure, polymorphism; molecular magnetism; high-spin complex molecules with o-semiquinones, magnetic interactions, correlations between structure and magnetic properties; structural dynamics of o-semiquinonato-complexes in solution, EPR study, spin labels
Interests: transition metal compounds based on redox-active ligands; valence tautomerism; magnetic exchange interactions
Special Issue Information
Dear Colleagues,
The development of molecular materials whose physical properties can be manipulated by external stimuli—such as temperature, light, magnetic field, and pressure—has attracted much attention owing to their potential applications in molecular devices. So-called bistable compounds possessing Spin Crossover (SCO) and/or Valence tautomerism (VT) attract attention of chemists and physicists because both phenomena are the ways to alter the physical properties of crystalline materials. VT is a structural isomerism followed by reversible electron transfer between metal centers and redox-active ligands. SCO is a structural isomerism accompanied by the change of spin state of central metal ion. The symmetry of a molecule plays a definite role in determining both the SCO and VT equilibria. Symmetry defines the order of electronic states of isomers between which the transition should occur. The structural symmetry of ligands, meanwhile, determines the degree of degeneration of the electronic states of each isomer.
The present Special Issue is open to contributions (original research papers, reviews, and perspective articles) related to recent advances in materials and molecular systems related to valent tautomerism. The topics of interest for this issue include but are not limited to:
- Regularities of SCO and VT transformations in symmetric and asymmetric systems;
- Thermally- and light-induced SCO and VT conversion;
- Phase transitions coupled with SCO and VT transformation;
- Structural studies of SCO and VT compounds;
- Quantum chemical modeling SCO and VT transition metal complexes;
- Thermodynamic aspects of SCO and VT transformation;
- Molecular materials based on SCO and VT compounds.
Prof. Dr. Michael P. Bubnov
Dr. Alexey A. Zolotukhin
Guest Editors
Manuscript Submission Information
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Keywords
- spin crossover
- valence tautomerism
- redox isomerism
- phase transition
- symmetry
- thermodynamics
- applications
- structural features
