title: Supramolecular cobalt cages and coordination polymers templated by anion guests: self-assembly, structures, and magnetic properties.
abstract: We report the anion-templated syntheses of a variety of supramolecular assemblies of Co(II). Remarkably in the presence of a weakly coordinating ion such as BF(4) (-), a discrete three-dimensional cage [BF(4) subset(BF(4))(2)Co(2)(L(1))(4)][BF(4)] (2) is formed with three coordinated BF(4) (-) ions, a rare example in supramolecular chemistry (L(1)=di(benzimidazole)-1,4-phenylene). Switching to stronger coordinating ions, such as NO(3) (-) or Cl(-), a one-dimensional coordination polymer [[Co(L(1))(NO(3))(2)](n)] (3) and a metallomacrocycle [Co(2)(L(1))(2)(Cl)(4)] (5) were formed, respectively. These results illustrate the powerful effect of the anion-templating chemistry. Finally the magnetic properties of these assemblies 1 b, 2, 3, and 5 are presented and discussed.
authors.affiliation: Laboratoire de Chimie Inorganique et Matériaux Moléculaires, UMR CNRS 7071, Université Pierre et Marie Curie-Paris 6, 4 place Jussieu, case 42, 75252 Paris Cedex 05, France. amouri@ccr.jussieu.fr
authors.forename: Hani
authors.initials: H
authors.lastname: Amouri
authors.forename: Christophe
authors.initials: C
authors.lastname: Desmarets
authors.forename: Alexandre
authors.initials: A
authors.lastname: Bettoschi
authors.forename: Marie Noelle
authors.initials: MN
authors.lastname: Rager
authors.forename: Kamal
authors.initials: K
authors.lastname: Boubekeur
authors.forename: Pierre
authors.initials: P
authors.lastname: Rabu
authors.forename: Marc
authors.initials: M
authors.lastname: Drillon