The electrochemical growth of polyalkylterthiophenes has been monitored in situ with the Electrochemical Quartz Crystal Microbalance (EQCM). Potential controlled synthesis of poly-3′4′-didodecyilterthiophene (3′4′-DDTT) and poly-33″-DDTT revealed an unexpected cathodic precipitation following the anodic deposition. From the analysis of the experimental data we obtained an excellent fit of the cathodic precipitation curves with a first-order nucleation law. A correlation between substitution pattern of the starting monomers and the deposition kinetic of the resulting polymers was found. Factors controlling the cathodic deposition of the Poly-DDTTs didn't depend on the presence of a parent phase on the electrode. Finally, long time-scale experiments (500s) with EQCM during potentiostatic synthesis of Poly-DDTTs revealed an evolution of the deposited mass with peculiar features of a process under diffusion control.
Dini D., Decker F., Zotti G., Schiavon G., Zecchin S., Andreani F., et al. (1999). EQCM Characterization of some substituted polyterthiophenes. ELECTROCHIMICA ACTA, 44(12), 1911-1917 [10.1016/S0013-4686(98)00300-4].
EQCM Characterization of some substituted polyterthiophenes
Salatelli E.;Lanzi M.
1999
Abstract
The electrochemical growth of polyalkylterthiophenes has been monitored in situ with the Electrochemical Quartz Crystal Microbalance (EQCM). Potential controlled synthesis of poly-3′4′-didodecyilterthiophene (3′4′-DDTT) and poly-33″-DDTT revealed an unexpected cathodic precipitation following the anodic deposition. From the analysis of the experimental data we obtained an excellent fit of the cathodic precipitation curves with a first-order nucleation law. A correlation between substitution pattern of the starting monomers and the deposition kinetic of the resulting polymers was found. Factors controlling the cathodic deposition of the Poly-DDTTs didn't depend on the presence of a parent phase on the electrode. Finally, long time-scale experiments (500s) with EQCM during potentiostatic synthesis of Poly-DDTTs revealed an evolution of the deposited mass with peculiar features of a process under diffusion control.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
