Bilayer Packing of Amphiphilic Cationic Fullerenes in Crystalline Salts: Models for Self-Assembled Nanostructures

The structures of three crystalline salts[C60(N(CH2CH2)2NH)+][Rh(CO)2Cl2−]·2CS2, [C60(CH2NH(CH3)CH2)+][Rh(CO)2Cl2−]·CS2, and [C60(CH2N(CH3)(CH2CH3)CH2)+](I−)·CH3CH2Ihave been determined. Each packs in a bilayered arrangement such that the cationic heads of the fullerene units and the corresponding anions form distinct polar regions, whereas the fullerene cage and the solvate molecules (carbon disulfide or ethyl iodide) are located in distinct hydrophobic regions.