chemo-selective electrochemical oxidation of thioethers to sulfoxides and sulfones was developed. The hydrogenbonding network generated from hexafluoro-2-propanol (HFIP) and acetic acid (AcOH) plays an important role in the modulation of oxidationpotential. The hydrogenbonding network complexes strongly with the sulfoxide, making it less prone to further oxidation. Therefore, thioethers can be selectively