title: New hexanuclear group 11 pyrazolate complexes: synthesis and photophysical features.
abstract: The treatment of 2,2'-di(1,2-pyrazol-3-yl)-1,1'-binaphthyl with two equivalents of appropriate monovalent group 11 precursors in the presence of a base leads to a complete exchange of the pyrazole NH protons with M(+) cations. Structural characterisation of the copper(I) complex revealed a hexanuclear complex with a pelton-wheel-like arrangement of the binaphthyl unit. As indicated by their spectroscopic data, all three complexes are isostructural. The complexes show a complex fluorescence behaviour that can be partially related to the ligand system and also to the metal sites, as indicated by the position of the fluorescence peaks and their temperature dependence and lifetimes.
authors.affiliation: Fachbereich Chemie & Research Centre OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. Geb. 54, 67663 Kaiserslautern, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Jozak
authors.forename: Yu
authors.initials: Y
authors.lastname: Sun
authors.forename: Yvonne
authors.initials: Y
authors.lastname: Schmitt
authors.forename: Sergei
authors.initials: S
authors.lastname: Lebedkin
authors.forename: Manfred
authors.initials: M
authors.lastname: Kappes
authors.forename: Markus
authors.initials: M
authors.lastname: Gerhards
authors.forename: Werner R
authors.initials: WR
authors.lastname: Thiel