title: Structure and magnetic field-induced transition in a one-dimensional hybrid inorganic-organic chain system, Co2(4,4'-bpy)(tfhba)2.4,4'-bpy (4,4'-bpy = 4,4'-bipyridine; tfhba = 2,3,5,6-tetrafluoro-4-hydroxybenzoate).
abstract: Two isostructural hybrid inorganic-organic frameworks, M(2)(4,4'-bpy)(tfhba)(2).4,4'-bpy, (M = Co (1), Zn (2); 4,4'-bpy = 4,4'-bipyridine; tfhba = 2,3,5,6-tetrafluoro-4-hydroxybenzoate) have been synthesized and their structures elucidated using single crystal X-ray diffraction. These materials are the first hybrid structures synthesized using the tfhba ligand. They contain a one-dimensional chain of corner-sharing MO(4)N trigonal bipyramids that has not been observed to date for Co(2+) units. The magnetic properties of 1 have been investigated and indicate ferromagnetic ordering along the chains, with weak antiferromagnetic interactions between them. Overall the system is antiferromagnetic with a Neel temperature of 3 K, but undergoes a field-induced magnetic phase transition at 3 kOe.
authors.affiliation: Materials Research Laboratory, University of California, Santa Barbara, California 93106-5121, USA. zhulvey@chem.ucsb.edu
authors.forename: Zeric
authors.initials: Z
authors.lastname: Hulvey
authors.forename: Brent C
authors.initials: BC
authors.lastname: Melot
authors.forename: Anthony K
authors.initials: AK
authors.lastname: Cheetham