The structure and modified properties of a self-dimerised Cu() inclusion complex in γ-cyclodextrins

Inclusion structures incorporating more than one guest molecule are elusive because confinement alters their molecular properties. We report the solid-state characterization of an inclusion complex comprising two γ-cyclodextrins and two [Cu(2-pyridinemethanolate)(2-pyridinemethanol)]PF 6 units. Quantum calculation reveals that interfragment charge transfer occurs. The confined Cu fragment and the unincluded "linear chain [Cu(2-pyridinemethanolate)(2-pyridinemethanol)]PF 6 " exhibit different properties. Cu fragments in γ-cyclodextrins show different properties from those of unincluded fragments caused by the confinement and the interaction between Cu fragments.