title: Tuneable intramolecular intermetallic interactions as a new tool for programming linear heterometallic 4f-4f complexes.
abstract: Statistical mechanics predicts that the design of pure organized heteropolymetallic chains of metal ions bound to linear receptors depends on controlled deviations from the mixing rule DeltaE(MiMj) = 1/2 (DeltaE(MiMi) + DeltaE(MjMj)), whereby DeltaE(MiMj) is the intramolecular intermetallic interaction between neighboring metal i and metal j along the receptor. A thorough investigation of linear polymetallic trivalent lanthanide triple-stranded helicates shows that such deviations are amplified by an increase in the nuclearity of the final complexes and are thus easily evidenced in the tetranuclear heterobimetallic helicates [La(4-y)Lu(y)(L6)3](12+) (y = 0-4). The chemical and physical origins of this unprecedented behavior are discussed together with its practical consequences for programming pure heteropolymetallic 4f-4f complexes.
authors.affiliation: Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, Geneva 4, Switzerland.
authors.forename: Natalia
authors.initials: N
authors.lastname: Dalla-Favera
authors.forename: Josef
authors.initials: J
authors.lastname: Hamacek
authors.forename: Michal
authors.initials: M
authors.lastname: Borkovec
authors.forename: Damien
authors.initials: D
authors.lastname: Jeannerat
authors.forename: Gianfranco
authors.initials: G
authors.lastname: Ercolani
authors.forename: Claude
authors.initials: C
authors.lastname: Piguet