Sandwiching C70 between two crown ether-bound cations: regioselective synthesis, electrochemistry and cation binding properties of C70 bis-crown ether conjugates
Regioselective Bingel macrocyclization of C60 with a bis-malonate containing a novel dibenzo[18] crown-6 tether provides a versatile access to trans-1 fullerenebis-adducts such as (±)-1. Complexation of a potassium ion by (±)-1 has a pronounced effect on the redox properties of the carbon sphere as a result of the close proximity of the fullerene surface to the crown ether bound cation, which is enforced by the