EB with Lewis Acids

Solutions of EB may be also readily doped with a range of metal salts and Lewis acids in a process (Equation 4.2) reminiscent of the Bronsted acid doping of EB described earlier. Similar to protonic doping, binding of the metal ions to imine N sites on the EB chains is believed to occur, leading to conducting PAn products of the general type 14. 

In a recent fascinating development of this approach, Hirao and coworkers181 have produced chiral induction in poly(ort/zotoluidine) via the complexation of EB with chiral Pd(II) complexes bearing one labile coordination site. The chirality of the ligand moieties of the Pd complex is believed to induce a propeller twist of the PAn backbone. 

---

Postpolymerization modification — enhancing functionality Covalently substituted polyanilines Doping of EB with Bronsted acids, HA Incorporation of chiral dopant anions or cations Doping of EB with Lewis acids Doping of EB with organic electron acceptors Ion implantation Structure of Polyaniline... 

---