Surface composition of [BMP][Tf2N] and [PMIm][Tf2N] in the presence of NbF5 and TaF5. A photoelectron spectroscopy study

At ambient conditions and high MF5 (M = Ta, Nb) concentration, a strong deviation from the expected stoichiometry in the near surface region was observed, obviously caused by chemical reactions of the IL/salt system with the atmospheric environment. It is expected, that these reactions have also impact on the quality of electrodeposited metal films from these solutions.