A cobalt(ii) spin-crossover compound with partially charged TCNQ radicals and an anomalous conducting behavior.

ABSTRACT: The bifunctional salt [Co(terpy)₂](TCNQ)₃·CH₃CN (terpy = 2,2';6',2''-terpyridine, TCNQ = 7,7,8,8-tetracyanoquino-dimethane) exhibits a high room temperature conductivity of 0.13 S cm^-1 and an anomaly in conductivity at ∼190 K as evidenced by variable temperature structural, magnetic and conductivity studies. The anomaly in the conductivity at 190 K has been correlated with the temperature dependent structural breathing and Jahn-Teller distortion of the low spin state of the SCO units, as well as the charge fluctuations and supramolecular π-stacking interactions of partially charged TCNQ radicals. The modular synthetic approach leads to an accessible source of partially charged TCNQ radicals for the facile preparation of bifunctional molecular mat

SUBMITTER: Zhang X 

PROVIDER: S-EPMC5530863 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature