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oai:recercat.cat:2117/1729782026-01-27T04:16:00Zcom_2072_1033col_2072_452950

2,7-Linked N-methylcarbazole copolymers by combining the macromonomer approach and the oxidative electrochemical polymerization Escalona, Cindy Estrany Coda, Francesc Ahumada Castillo, Juan Carlos Esteban Borràs Cristòfol, Núria Soto Galdámes, Juan Pablo Alemán Llansó, Carlos Universitat Politècnica de Catalunya. Departament d'Enginyeria Química Universitat Politècnica de Catalunya. IMEM-BRT- Innovation in Materials and Molecular Engineering - Biomaterials for Regenerative Therapies Àrees temàtiques de la UPC::Enginyeria química Copolymers Conducting polymers Electrolytic oxidation Polymerization Electrochemistry Polymer synthesis Molecular engineering Conducting polymer Polycarbazole Poly(3 4-ethylenedioxythiophene) Potentiodynamic sweep Copolímers Polímers conductors Oxidació electrolítica Polimerització Electroquímica The preparation of copolymers bearing N-methylcarbazole and 2,7-linked 3,4-ethylenedioxythiophene units has been carried out using the N-methyl-2,7-di(2-(3,4-ethylenedioxythienyl))carbazole monomer, which has been chemically synthesized through the Stille coupling reaction of 2,7-dibromo-N-methylcarbazole and tributyl-stannylated 3,4-ethylenedioxythiophene. Then, the monomer was electropolymerized by chronoamperometry in acetonitrile with 0.1 M LiClO4 under a constant potential of 0.70 V and using steel AISI 316 electrodes. The electrochemical activity and stability, charge–discharge capacity, charge transfer resistance and surface properties (i.e. morphology, topography and wettability) of the resulting polymer have been characterized and compared with those reported for poly(3,4-ethylenedioxythiophene). Finally, the polymer has been obtained by potentiodynamic sweep, applying around 100 cyclic voltammetry steps to an acetonitrile solution of the N-methyl-2,7-di(2-(3,4-ethylenedioxythienyl))carbazole monomer with 0.1 M LiClO4. Results show that although this technique has been mostly used to electropolymerize diheteroaromatic-subtituted carbazoles, the resulting material presents serious disadvantages with respect to that produced by chronoamperometry under a constant potential. Postprint (author's final draft) 2019-05-03 Article Escalona, C. [et al.]. 2,7-Linked N-methylcarbazole copolymers by combining the macromonomer approach and the oxidative electrochemical polymerization. "Polymer bulletin", 3 Maig 2019, p. 1-10. 0170-0839 https://hdl.handle.net/2117/172978 10.1007/s00289-019-02799-8 eng https://link.springer.com/article/10.1007/s00289-019-02799-8 Open Access 10 p. application/pdf application/pdf