Polythionine films

Scheme 1 Scheme-of-squares representation of the redox-switching mechanism of a polythionine film exposed to acetic acid solution. Th represents a monomeric thionine unit, A represents acetate, and X can be either a water or acetic acid molecule. (Reproduced from Ref [124] with permission from the American Chemical Society.)... 

Bruckenstein et al. [84] also reported QCM experiments on electrodeposited PVF and on polythionine. For PVF, mass and charge vs potential curves are similar for lower scan rates. For polythionine films in aqueous NaC104, it was proposed that CIO4 ions move into the film during oxidation, and solvent molecules (H2O) move out. 

---