Electropolymerization of 2-methoxyaniline. Polymerization kinetics and phenazine insertion at low monomer concentrationElectronic supplementary information (ESI) available: Cyclic voltammograms. See http://www.rsc.org/suppdata/cp/b1/b110705d/

Abstract

The electropolymerization of 2-methoxyaniline (MOA) has been found to yield products having structure and properties dependent on the monomer concentration, with the insertion of phenazinic units giving a redox-type polymer at low concentrations. The kinetics of this process is studied in 1 M HClO 4 solutions containing different monomer concentrations. The voltammetric results are compared with the electropolymerization, in similar experimental conditions, of other aryl amines such as aniline and 2-methylaniline. The effect of dimeric additives on the polymerization rate of MOA is also studied. A change in the kinetic behavior is found at MOA concentrations of about 30-60 mM. An electropolymerization mechanism for 2-methoxyaniline is proposed through a reaction scheme similar to that of aniline, with the inclusion of a step consisting in a head-to-head coupling of oligomers and/or polymer chains yielding phenazine-type units, that effectively works as a termination step. The resistivity increase, in the conductive state, due to the insertion of redox units is also considered. The experimental results are interpreted on the basis of this mechanism.y Electronic supplementary information (ESI) available: Cyclic voltammograms. See

Carbon aerogels with ultrathin, electroactive poly(o-methoxyaniline) coatings for high-performance electrochemical capacitors

“…4(c)). The potentials of these two redox couples are reasonably consistent with previous reports for POMA electrodeposited under acidic conditions, although some of those films exhibited additional peaks at more positive potentials [29,[32][33][34][35][36][37]. We are currently extending our investigations of the chemical and electrochemical properties of POMA formed under these high-pH solution conditions.…”

“…The electrodeposition and characterization of POMA films was previously reported [29][30][31][32][33][34][35][36][37], but to our knowledge this is the first reported example of an electroactive POMA film electrodeposited from such high pH conditions. Poly(aniline) has been more extensively studied, and previous studies have demonstrated that PANI films can be electrodeposited from electrolytes over a wide pH range [38].…”

“…For the electropolymerization of o-methoxyaniline the polymer growth process also crucially depends on the initial monomer concentration. Viva et al demonstrated that for concentrations of o-methoxyaniline below $30 mM, polymer film growth was limited, even in the strongly acidic deposition solutions, and the resulting POMA film exhibited a more irregular chemical structure [32,33].…”

Effect of the intercalated cation on the properties of poly(o-methylaniline)/maghnite clay nanocomposites

“…Figure 8 shows that there are remarkable differences. Thus, the PoMea produced from Magh-Cu is electroactive; however, no redox processes are observed for the same polymer from PoMea/Magh-H. For PoMea/Magh-Cu, a broad anodic peak at 0.72 V appears and two reduction peaks (at 0.44 V and around 0.6 V) are observed in the reverse scan, which suggest the existence of two redox processes as occurs in most ring-substituted polyaniline [34][35][36][37].…”

Electrochemomechanical properties of aniline/2-methoxyaniline copolymers

“…To overcome that, polymers of derivatives such as 2-methylaniline [24][25][26][27], 2-ethylaniline [28] or 2-methoxyaniline (MOA) [29][30][31][32][33] have been investigated, and also copolymers or composites [34] of aniline (ANI) and other suitable monomers [35][36][37]. A copolymer which is gaining increasing attention is poly(aniline-co-2-methoxyaniline) (PAcoM) [38][39][40][41][42][43].…”