10.1021/ic400158q.s001
Pilar Amo-Ochoa
Pilar
Amo-Ochoa
Esther Delgado
Esther
Delgado
Carlos J. Gómez-García
Carlos J.
Gómez-García
Diego Hernández
Diego
Hernández
Elisa Hernández
Elisa
Hernández
Avelino Martin
Avelino
Martin
Félix Zamora
Félix
Zamora
Electrical
Bistability around Room Temperature in an Unprecedented One-Dimensional
Coordination Magnetic Polymer
American Chemical Society
2016
conductivity measurements show
Differential Scanning Calorimetry
title compound
Fe
coordination polymer
interaction
transition
2016-02-19 08:31:43
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Electrical_Bistability_around_Room_Temperature_in_an_Unprecedented_One_Dimensional_Coordination_Magnetic_Polymer/2413402
The
synthesis, crystal structure, and physical properties of an unprecedented
one-dimensional (1D) coordination polymer containing [Fe<sub>2</sub>(S<sub>2</sub>C<sub>6</sub>H<sub>2</sub>Cl<sub>2</sub>)<sub>4</sub>]<sup>2–</sup> entities bridged by dicationic [K<sub>2</sub>(μ-H<sub>2</sub>O)<sub>2</sub>(THF)<sub>4</sub>]<sup>2+</sup> units are described. The magnetic properties show that the title
compound presents pairwise Fe–Fe antiferromagnetic interactions
that can be well reproduced with a <i>S</i> = 1/2 dimer
model with an exchange coupling, <i>J</i> = −23 cm<sup>–1</sup>. The electrical conductivity measurements show that
the title compound is a semiconductor with an activation energy of
about 290 meV and two different transitions, both with large hysteresis
of about 60 and 30 K at 260–320 K and 350–380 K, respectively.
These two transitions are assumed to be due to slight structural changes
in the cation–anion interactions. Differential Scanning Calorimetry
confirms the presence of both transitions. This compound represents
the first sample of a coordination polymer showing electrical bistability.