title: Electrical bistability around room temperature in an unprecedented one-dimensional coordination magnetic polymer.
abstract: The synthesis, crystal structure, and physical properties of an unprecedented one-dimensional (1D) coordination polymer containing [Fe2(S2C6H2Cl2)4](2-) entities bridged by dicationic [K2(μ-H2O)2(THF)4](2+) units are described. The magnetic properties show that the title compound presents pairwise Fe-Fe antiferromagnetic interactions that can be well reproduced with a S = 1/2 dimer model with an exchange coupling, J = -23 cm(-1). 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.
authors: Departamento de Química Inorgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
authors: Pilar
authors: P
authors: Amo-Ochoa
authors: Esther
authors: E
authors: Delgado
authors: Carlos J
authors: CJ
authors: Gómez-García
authors: Diego
authors: D
authors: Hernández
authors: Elisa
authors: E
authors: Hernández
authors: Avelino
authors: A
authors: Martin
authors: Félix
authors: F
authors: Zamora
mesh_terms: D002152:Calorimetry, Differential Scanning; D004583:Electrons; D060526:Magnetic Fields; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D013696:Temperature
chemical_list: D009942:Organometallic Compounds; D011108:Polymers