Cyclic voltammetry was used to assess the electrochemical redox behavior of monomers 1-4 (S23-S25). Cyclic voltammetry of each monomer was measured between -3.0 and +1.5 V versus Fc/Fc + in a 0.1 M nBu4NPF6 acetonitrile solution (Fig. ). This electrolyte and solvent were selected as they have stability across the potential range of interest, and more efficient reaction of the monomer was observed in this solvent than was observed for other solvents such as DMF, THF, and dichloromethane (S26-S27). Trisulfide monomers 1, 3 and 4 exhibited two irreversible redox peaks, a cathodic peak between -2.5 and -2.2 V versus Fc/Fc + , and an anodic peak between -1.0 and -1.4 V versus Fc/Fc + (Fig. ). The cyclic voltammogram of pentasulfide monomer 2 presents additional redox features at -1.6 and -0.8 V versus Fc/Fc + (Fig. ). These lower redox potentials are likely derived from the different redox activity of the five-membered sulfur ring in monomer 2 compared to the trisulfide structure of the other monomers.