In my case I have performed the CV of electrodeposited methylene blue in glassy carbon electrode in 0.1 M phosphate buffer solution. It is possible to calculate HOMO-LUMO bandgap with in this system?
Hye,
First, get the CV graph for ferrocene (internal standard), and then for your compound, HOMO or ground state oxidation potential will be the onset of oxidation of your compound in the CV graph (add 0.63V to convert against NHE from Ferrocene).
likewise, calculate the Eg as = E(LUMO) - E(HOMO), where E(LUMO) = -[(Ered - E1/2(ferrocene) + 4.8] eV and E(HOMO) = -[(Eox - E1/2(ferrocene) + 4.8] eV
Hope my answer would be helpful to you.
Good luck.
Gaurav Pandey thank you for your suggestion. I already know the HOMO-LUMO calculation from CV measurement. My question is whether this calculation is applicable for aqueous electrolyte.
P. Kanagavalli ,
Water is not suitable for the above calculation. Since water too will generate the hydrogen and oxygen production reactions, so I would suggest the use of an organic solvent.
Thanks
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