The conducting spin-crossover compound combining Fe(II) cation complex with TCNQ in a fractional reduction state
Yuri N. Shvachko, Denis V. Starichenko, Aleksander V. Korolyov, Eduard, B. Yagubskii, Alexander I. Kotov, Lev I. Buravov, Konstantin A. Lyssenko,, Vladimir N Zverev, Olga G. Shakirova, Ludmila G. Lavrenova
TL;DR
This study reports the synthesis and characterization of a spin-crossover compound combining Fe(II) complex cations with TCNQ, exhibiting conductivity and a spin transition with notable changes in resistivity and EPR signals.
Contribution
It introduces a novel radical anion salt with combined conductivity and spin-crossover properties, linking structural features to magnetic and electronic transitions.
Findings
Pronounced change in dc resistivity during SCO transition
Broadening of EPR signal associated with spin crossover
Evidence of cross relaxation between TCNQ and Fe(II) spins
Abstract
The radical anion salt [Fe{HC(pz)3}2](TCNQ)3 demonstrating conductivity and spin-crossover transition (SCO) associated with Fe(II) complex cation subsystem has been synthesized and structurally characterized. A pronounced change of the dc resistivity and a robust broadening of the EPR signal triggered by the SCO transition are found. Enhanced EPR line broadening is interpreted in terms of cross relaxation between the TCNQ and Fe(II) spin subsystems
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Taxonomy
TopicsMagnetism in coordination complexes · Organic and Molecular Conductors Research · Electron Spin Resonance Studies