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SYNTHESIS OF POLYCATECHOL WITH ELECTROCHEMICAL ACTIVITY AND ITS PROPERTIES

Chinese Journal of Polymer Science 2002年第6期20卷 517-524页

作者： Yong Kong Shao-lin Mu Bing-wei Mao Department of Chemistry School of Sciences, Yangzhou University Yangzhou 225002, China State Key Laboratory of Physical Chemistry of the Solid Surface, Xiamen University,Xiamen 361005, China Department of Chemistry School of Sciences Yangzhou University Yangzhou 225002 Xiamen University State Key Laboratory of Physical Chemistry of the Solid Surface Xiamen 361005

The electrochemical polymerization of catechol on platinum has been carried out using repeated potential cycling between -0.2 and 1.1 V (versus SCE). The electrolytic solution consisted of 0.2 mol dm(-3) catechol, 0.5 mol dm(-3) NaCl and 0.1 mol dm(-3) Na2HPO4 with pH 8.72. Catechol can not be polymerized at pH greater than or equal to 10.12. Polycatechol has an electrochemical lactivity at pH less than or equal to 4. The anodic and cathodic peak potentials of polycatechol shift towards more negative values as the pH of the solution increases from 1 to 4. The electrochemical activity of polycatechol hardly changes in this pH region, but it decreases slowly with time. This is caused by oxygen in air, which leads to an irreversible oxidation of polycatechol. This property is favorable for protecting metals from corrosion. Raman and FTIR spectra of polycatechol and catechol are quite different. afm images of polycatechol films provide evidence that the image of the oxidized state of polycatechol is markedly different from that of the reduced one. This difference is caused by doping and dedoping of polycatechol.

关键词： catechol polycatechol electrochemical activity Raman spectra FTIR spectra afm images

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Mini Review: Chemical Mesoscopics Notions in the Explanation of Polymeric Materials Modification Mechanism with Participation of Metal Carbon Mesocomposites

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Organic Polymer Material Research 2020年第2期2卷 8-12页

作者： V.I.Kodolov V.V.Kodolova-Chukhontseva I.N.Shabanova N.S.Terebova Yu.V.Pershin R.V.Mustakimov Basic Research-High Educational Centre of Chemical Physics&Mesoscopics UDRASIzhevskRussia M.T.Kalashnikov Izhevsk State Technical University IzhevskRussia Institute of Macromolecular Compounds Russian Academy o SciencesSt PetersburgRussia Udmurt Federal Research Centre Russian Academy of SciencesIzhevskRussia

The paper is dedicated to the consideration of the chemical mesoscopics notions application for the explanation of polymeric materials modification mechanism by the metal carbon mesoscopic *** main peculiarities of these nanosized particles are following:a)the presence of unpaired electrons on the carbon cover;b)the structure of carbon cover consists from poly acetylene and carbine fragments;c)the atomic magnetic moment of inner metal is equaled to more than 1,3μ*** metal carbon mesocomposites activity depends on the medium and conditions influence because of the possible changes of the phase coherency and quantization of negative charges.

关键词： Chemical mesoscopics Quantization Phase coherency X ray photoelectron spectra IR spectra afm images Metal carbon mesocomposites Modification Self organization

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