title: Approaching the limit of Cu(II)/Cu(I) mixed valency in a Cu(I)Br2-N-methylquinoxalinium hybrid compound.
abstract: A novel 1D hybrid salt (MQ)[CuBr2]∞ (MQ = N-methylquinoxalinium) is reported. Structural, spectroscopic and magnetic investigations reveal a minimal Cu(II) doping of less than 0.1%. However it is not possible to distinguish Cu(I) and Cu(II). The unusually close packing of the organic moieties and the dark brown colour of the crystals suggest a defect electronic structure.
authors.affiliation: Institut für Nanotechnologie, Karlsruher Institut für Technologie, Hermann- von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany. nicolas.leblanc@partner.kit.edu.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Leblanc
authors.forename: Stephen
authors.initials: S
authors.lastname: Sproules
authors.forename: Claude
authors.initials: C
authors.lastname: Pasquier
authors.forename: Pascale
authors.initials: P
authors.lastname: Auban-Senzier
authors.forename: Helene
authors.initials: H
authors.lastname: Raffy
authors.forename: Annie K
authors.initials: AK
authors.lastname: Powell