*2.2. Synthesis of EO3–C60*

Covalent attachment of triethylene glycol monomethyl ether to C60 fullerene through azide addition was performed following a previously described method [35]. Product was confirmed by 1 H NMR performed in CDCl3 on a Bruker 300 MHz nuclear magnetic resonance spectrometer with a TMS internal standard. Characterization data is consistent with that previously reported [35].
