Chemical functionalization of activated carbon through radical and diradical intermediates |
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| Affiliation: | 1. LUNAM Université, Université d''Angers, CNRS UMR 6200, Laboratoire MOLTECH-Anjou, 2 bd Lavoisier, 49045 ANGERS cedex, France;2. Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, rue de la Houssinière, BP32229, 44322 Nantes Cedex 3, France;1. Dipartimento di Chimica “Ugo Schiff”, Università degli Studi di Firenze, via della Lastruccia 3-13, Sesto Fiorentino, FI, Italy;2. Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), via Celso Ulpiani 27, 70126 Bari, Italy;3. IENI-CNR and INSTM, Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy;4. Istituto di Chimica dei Composti OrganoMetallici (ICCOM) CNR, via Madonna del Piano 10, 50019 Sesto Fiorentino, FI, Italy;5. Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca'' Foscari Venezia, via Torino 155, 30170 Venezia Mestre, Italy;6. SCSOP, Via Bornò 5, 23896 Sirtori, LC, Italy |
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| Abstract: | Small redox molecules were grafted on carbon through radical and diradical procedures. The reactive intermediates were derived from the 3,4-dimethoxybenzenediazonium salt and the 4,5-dimethoxybenzenediazonium-2-carboxylate salt prepared and decomposed in situ, yielding the dimethoxybenzene radical and the analogous diradical benzyne, respectively. In both cases, the activated carbon Norit serves as trapping agent and the dimethoxybenzene–carbon composites obtained were compared by thermal gravimetric analysis, X-ray photoelectron spectroscopy and cyclic voltammetry. After oxidative ether cleavage of dimethoxybenzene molecules attached to the surface, the resultant catechol-modified carbon electrodes served as pseudo-capacitive materials in aqueous electrochemical capacitors. |
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