| Literature DB >> 27541570 |
Yuri N Shvachko1, Denis V Starichenko1, Aleksander V Korolyov1, Eduard B Yagubskii2, Alexander I Kotov2, Lev I Buravov2, Konstantin A Lyssenko3, Vladimir N Zverev4,5, Sergey V Simonov4, Leokadiya V Zorina4, Olga G Shakirova6, Lyudmila G Lavrenova7.
Abstract
The radical anion salt [Fe{HC(pz)3}2](TCNQ)3 demonstrates conductivity and spin-crossover (SCO) transition associated with Fe(II) complex cation subsystem. It was synthesized and structurally characterized at temperatures 100, 300, 400, and 450 K. The compound demonstrates unusual for 7,7,8,8,-tetracyanoquinodimethane (TCNQ)-based salts quasi-two-dimensional conductivity. Pronounced changes of the in-plane direct-current resistivity and intensity of the electron paramagnetic resonance (EPR) signal, originated from TCNQ subsystem, precede the SCO transition at the midpoint T* = 445 K. The boltzmannian growth of the total magnetic response and structural changes in the vicinity of T* uniquely show that half [Fe{HC(pz)3}2] cations exist in high-spin state. Robust broadening of the EPR signal triggered by the SCO transition is interpreted in terms of cross relaxation between the TCNQ and Fe(II) spin subsystems.Entities:
Year: 2016 PMID： 27541570 DOI： 10.1021/acs.inorgchem.6b01829
Source DB: PubMed Journal: Inorg Chem ISSN： 0020-1669 Impact factor: 5.165