title: Spin Frustration in an Organic Radical Ion Salt Based on a Kagome-Coupled Chain Structure.
abstract: Electro-oxidation of the quinoidal bisdithiazole BT in dichloroethane in the presence of [Bu4N][GaBr4] affords the 1:1 radical ion salt [BT][GaBr4], crystals of which belong to the trigonal space group P3. The packing pattern of the radical cations provides a rare example of an organic kagome basket structure, with S = 1/2 radical ion chains located at the triangular corners of a trihexagonal lattice. Magnetic measurements over a wide temperature range from 30 mK to 300 K suggest strongly frustrated AFM interactions on the scale of J/kb ∼ 30 K, but reveal no anomalies that would be associated with magnetic order. These observations are discussed in terms of the symmetry allowed magnetic interactions within and between the frustrated layers.
authors.affiliation: Physikalisches Institut, Goethe-Universität , Frankfurt 60438, Germany.
authors.forename: Lars
authors.initials: L
authors.lastname: Postulka
authors.affiliation: Physikalisches Institut, Goethe-Universität , Frankfurt 60438, Germany.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Winter
authors.affiliation: Department of Chemistry, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Adam G
authors.initials: AG
authors.lastname: Mihailov
authors.affiliation: Department of Chemistry, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Aaron
authors.initials: A
authors.lastname: Mailman
authors.affiliation: Department of Chemistry, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Abdeljalil
authors.initials: A
authors.lastname: Assoud
authors.affiliation: Department of Chemistry, University of Liverpool , Liverpool L69 7ZD, United Kingdom.
authors.forename: Craig M
authors.initials: CM
authors.lastname: Robertson
authors.affiliation: Physikalisches Institut, Goethe-Universität , Frankfurt 60438, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Wolf
authors.affiliation: Physikalisches Institut, Goethe-Universität , Frankfurt 60438, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Lang
authors.affiliation: Department of Chemistry, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Richard T
authors.initials: RT
authors.lastname: Oakley