Scheme 1. Synthetic route of PSBEDOT. Reaction conditions: (i) 3-chloropropane-1,2-diol, p-toluenesulfonic acid, toluene; (ii) dimethylamine, water, acetonitrile; (iii) 1,3-propanesultone, tetrahydrofuran; (iv) electropolymerization in aqueous solution (see ESI†).