title: Extending the Family of V(4+) S=(1/2) Kagome Antiferromagnets.
abstract: The ionothermal synthesis, structure, and magnetic susceptibility of a novel inorganic-organic hybrid material, imidazolium vanadium(III,IV) oxyfluoride [C3 H5 N2 ][V9 O6 F24 (H2 O)2 ] (ImVOF) are presented. The structure consists of inorganic vanadium oxyfluoride slabs with kagome layers of V(4+) S=${{ 1/2 }}$ ions separated by a mixed valence layer. These inorganic slabs are intercalated with imidazolium cations. Quinuclidinium (Q) and pyrazinium (Pyz) cations can also be incorporated into the hybrid structure type to give QVOF and PyzVOF analogues, respectively. The highly frustrated topology of the inorganic slabs, along with the quantum nature of the magnetism associated with V(4+) , means that these materials are excellent candidates to host exotic magnetic ground states, such as the highly sought quantum spin liquid. Magnetic susceptibility measurements of all samples suggest an absence of conventional long-range magnetic order down to 2 K despite considerable antiferromagnetic exchange.
authors.affiliation: School of Chemistry and EaStChem, University of St Andrews, St Andrews, Fife, KY16 9ST (UK).
authors.forename: Lucy
authors.initials: L
authors.lastname: Clark
authors.affiliation: School of Chemistry and EaStChem, University of St Andrews, St Andrews, Fife, KY16 9ST (UK).
authors.forename: Farida H
authors.initials: FH
authors.lastname: Aidoudi
authors.affiliation: School of Chemistry and EaStChem, University of St Andrews, St Andrews, Fife, KY16 9ST (UK).
authors.forename: Cameron
authors.initials: C
authors.lastname: Black
authors.affiliation: School of Chemistry and EaStChem, University of St Andrews, St Andrews, Fife, KY16 9ST (UK).
authors.forename: Kasun S A
authors.initials: KS
authors.lastname: Arachchige
authors.affiliation: School of Chemistry and EaStChem, University of St Andrews, St Andrews, Fife, KY16 9ST (UK).
authors.forename: Alexandra M Z
authors.initials: AM
authors.lastname: Slawin
authors.affiliation: School of Chemistry and EaStChem, University of St Andrews, St Andrews, Fife, KY16 9ST (UK).
authors.forename: Russell E
authors.initials: RE
authors.lastname: Morris
authors.affiliation: School of Chemistry and EaStChem, University of St Andrews, St Andrews, Fife, KY16 9ST (UK). pl@st-andrews.ac.uk.
authors.forename: Philip
authors.initials: P
authors.lastname: Lightfoot
keywords: X-ray diffraction; crystal growth; fluorides; magnetic properties; vanadium