title: Chemical excision of tetrahedral FeSe(2) chains from the superconductor FeSe: synthesis, crystal structure, and magnetism of Fe(3)Se(4)(en)(2).
abstract: Fragments of the superconducting FeSe layer, FeSe2 tetrahedral chains, were stabilized in the crystal structure of a new mixed-valent compound Fe3Se4(en)2 (en = ethylenediamine) synthesized from elemental Fe and Se. The FeSe2 chains are separated from each other by means of Fe(en)2 linkers. Mössbauer spectroscopy and magnetometry reveal strong magnetic interactions within the FeSe2 chains which result in antiferromagnetic ordering below 170 K. According to DFT calculations, anisotropic transport and magnetic properties are expected for Fe3Se4(en)2. This compound offers a unique way to manipulate the properties of the Fe-Se infinite fragments by varying the topology and charge of the Fe-amino linkers.
authors.affiliation: Department of Chemistry, University of California, Davis , One Shields Avenue, Davis, California 95616, United States.
authors.forename: Chongin
authors.initials: C
authors.lastname: Pak
authors.forename: Saeed
authors.initials: S
authors.lastname: Kamali
authors.forename: Joyce
authors.initials: J
authors.lastname: Pham
authors.forename: Kathleen
authors.initials: K
authors.lastname: Lee
authors.forename: Joshua T
authors.initials: JT
authors.lastname: Greenfield
authors.forename: Kirill
authors.initials: K
authors.lastname: Kovnir
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005029:Ethylenediamines / Q000138:chemical synthesis / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008280:Magnetics; D008958:Models, Molecular; D012643:Selenium / Q000737:chemistry*; D013696:Temperature
chemical_list: D056831:Coordination Complexes; D005029:Ethylenediamines; C031234:ethylenediamine; D007501:Iron; D012643:Selenium