title: A radical spin on viologen polymers: organic spin crossover materials in water.
abstract: A polymer containing viologen radical cation monomer units is shown to reversibly switch between paramagnetic and diamagnetic states via non-covalent host-guest interactions or temperature control in water. Cycling between diamagnetic and paramagnetic forms is accompanied by changes in optical and magnetic properties.
authors.affiliation: Department of Chemistry, Iowa State University, 2101d Hach Hall, Ames, IA 50011, USA. winter@iastate.edu.
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Juetten
authors.forename: Alexander T
authors.initials: AT
authors.lastname: Buck
authors.forename: Arthur H
authors.initials: AH
authors.lastname: Winter