Cyclic voltammetry , fullerene derivatives

Reported LUMO levels of PCBM vary between 3.7 eV and -4.3 eV, because of different measurement methods, either in solution or solid, and different equations used to estimate the values. One of the most convenient teeh-niques to determine the LUMO level of fullerenes is cyclic voltammetry. The LUMO levels of fullerene derivatives can be estimated from the first redue-tion potential. Because reduction potentials depend on the choice of the reference electrode, and vary slightly as a result of different electrochemical cell settings and choice of solvent, the use of an internal reference compound is required for accurate determination of the redox potentials of fullerenes, and any other molecule for that matter. Ferrocene is the most widely used... 

---