Abstract
Anodic electrochemical polymerization of N,N′-ethylenbis(salicylideneaminato) nickel(II)([Ni(salen)]) in tetrabutylammonium perchlorate(TBAP)/acetonitrile(AN) was investigated by the linear sweep potential method.The sweep rate ranged from 5 to 150 mV.s-1.The effect of sweep rate on the growth of poly[Ni(salen)] was studied by Coulomb analysis.The morphologies of poly[Ni(salen)] were characterized by field emission scanning electron microscopy(FESEM).The relationship between the growth rate of poly[Ni(salen)](dГ/dm) and the sweep rate(v) fits the exponential degradation equation.The content of the redox center for poly[Ni(salen)],grown at sweep rate of 20 mV.s-1,reaches a maximum and then decreases as the sweep rate increases because monomer diffusion restricts the growth of poly[Ni(salen)].We studied the effect of polymerization sweep rate on the kinetics of the as-grown poly[Ni(salen)] by cyclic voltammetry.The charge diffusion coefficient(D) of poly[Ni(salen)] grown at a sweep rate of 20 mV.s-1 was found to be the highest.
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