Efficient synthesis of a new electroactive polymer of Co(II) porphine by in-situ replacement of Mg(II) inside Mg(II) polyporphine film

Sébastien D. Rolle; Dmitry V. Konev; Charles H. Devillers; Ksenia V. Lizgina; Dominique Lucas; Christine Stern; Frédéric Herbst; Olivier Heintz; Mikhail A. Vorotyntsev

doi:10.1016/j.electacta.2016.03.039

Efficient synthesis of a new electroactive polymer of Co(II) porphine by in-situ replacement of Mg(II) inside Mg(II) polyporphine film

Sébastien D. Rolle ¹ Dmitry V. Konev ^{2, 3, *} Charles H. Devillers ^{1, *} Ksenia V. Lizgina ⁴ Dominique Lucas ^{1, *} Christine Stern ¹ Frédéric Herbst ² Olivier Heintz ² Mikhail A. Vorotyntsev ^{1, 5, 3, 2, 4, *}

* Auteur correspondant

1 ICMUB - Institut de Chimie Moléculaire de l'Université de Bourgogne [Dijon]

2 Mendeleev University of Chemical Technology of Russia

3 Institute for Problems of Chemical Physics

4 Department of Fundamental Physical-Chemical Engineering, Lomonosov Moscow State University

5 MSU - Lomonosov Moscow State University

Abstract : This paper presents an easy, efficient and reproducible way to obtain cobalt polyporphine films. A fast three step process (less than one hour) based on electrosynthesis of magnesium polyporphine of type I followed by a demetallation in acid medium and then cobalt insertion inside the porphine units allowed us to obtain an interesting material with a high density of active cobalt(II) centers. Kinetics studies were conducted to determine the best conditions for the demetallation and remetallation steps. Moreover, IRATR and UV-visible measurements attested that the initial molecular structure of the porphine units was kept during the three step process. Qualitative composition of polyporphine films has been confirmed via XPS and EDX methods. In situ specific conductivity of these polyporphine polymers of type I has been determined as a function of the imposed potential, i.e. of the oxidation degree. (C) 2016 Elsevier Ltd. All rights reserved.

Keywords : electroactive materials electropolymerization ion-exchange cobalt porphine non-substituted porphyrins metalloporphines molecular electronic junctions glassy-carbon electrode free-base porphyrins reactivity correlations reduction potentials conducting polymer cobalt porphyrins aqueous-solution thin-films electroreduction

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Article dans une revue

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Chimie

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https://hal-univ-bourgogne.archives-ouvertes.fr/hal-01402476
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Soumis le : jeudi 24 novembre 2016 - 16:50:56
Dernière modification le : mercredi 4 septembre 2019 - 17:36:03

Efficient synthesis of a new electroactive polymer of Co(II) porphine by in-situ replacement of Mg(II) inside Mg(II) polyporphine film

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Efficient synthesis of a new electroactive polymer of Co(II) porphine by in-situ replacement of Mg(II) inside Mg(II) polyporphine film

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