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  • 1
    Electronic Resource
    Electronic Resource
    Electrochemical Polymerization of 2- Methyl-1- Naphthylamine in an Acidic Perchlorate Aqueous Medium (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 453-454 (May 2004), p. 139-144 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/08/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.453-454.139.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Structural Characterization of Poly(o-Tolidine) (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 494 (Sept. 2005), p. 357-362 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A new polymer of o-tolidine was synthesized by chemical and electrochemical methods from its aqueous solutions in 1M HCl. Chemical oxidative polymerization was performed using ammonium peroxydisulfate as an oxidant. Electrochemical polymerization was carried out using two steps which were successively repeated in a continual process: first, holding the working platinum electrode under a constant anodic potential of +1.6 V, and second, the voltammetric cycle between +0.3 and +1.6 V. During this procedure a polymeric film was formed on the working electrode. Polymerization of o-tolidine was exactly proved by gel permeation chromatographyevidencing the chains of molar masses in the range of 1000 – 12600 g mol─1. The structure of poly(o-tolidines) obtained by both chemical and electrochemical procedures was studied by IR spectroscopy. Coupling pathway N–C during polymerization, existence of quinonoid rings and hydrogen bonding involving NH group in polymeric products are revealed by IR spectroscopic analysis. The mechanism of o-tolidine oxidative polymerization is proposed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/11/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.494.357.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Chemical Oxidative Polymerization of 4-Amino-3-Hydroxynaphthalene-1-Sulfonic Acid and Its Salts (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 518 (July 2006), p. 405-410 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: New functional homopolymeric, semiconducting materials soluble in polar solvents,were synthesized by chemical oxidative polymerization of 4-amino-3-hydroxynaphthalene-1-sulfonic acid (AHNSA) and its salts, using ammonium peroxydisulfate as an oxidant, in water atroom temperature. Polymerization products obtained from AHNSA, AHNSA hydrochloride,AHNSA mono-sodium salt and AHNSA di-sodium salt were characterized by elemental analysis,gel-permeation chromatography (GPC), infrared spectroscopy (IR) and conductivity measurements.Polymers of AHNSA salts have increased weight-average molecular weights and polydispersityindex values, compared to AHNSA polymer. Molecular weights approach a maximum value of~25200 for polymers of AHNSA salts. Elemental analysis data of polymeric samples show adecrease of the S/C ratio for all polymeric materials in comparison with the monomer, indicatingconsiderable elimination of sulfonic acid group from the macromolecular structure during thepolymerization process. New substitution patterns shown by IR spectroscopic analysis combinedwith MNDO-PM3 semi-empirical quantum mechanical calculations revealed N─C couplingreactions as dominant, where C belongs to unsubstituted AHNSA ring. Coupling mode N─C1 isalso important. Naphthoquinonoid and benzenoid structures were observed by IR spectroscopy.Influence of pH on the AHNSA oxidative chemical polymerization mechanism was examined
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.518.405.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis and Characterization of Polyacriflavine (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 555 (Sept. 2007), p. 503-508 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: New functional polymeric, semiconducting materials were synthesized by chemicaloxidative polymerization of acriflavine hydrochloride in aqueous solution at room temperature,using ammonium peroxydisulfate as an oxidant. Polymerization products were characterized by gelpermeationchromatography (GPC), FTIR spectroscopy, scanning electron microscopy (SEM) andconductivity measurements. The influence of the oxidant/monomer molar ratio on the molecularstructure, molecular weight distribution and the electrical conductivity of polyacriflavines wasstudied. Molecular weights approach a maximum value of ~20000. The polyacriflavine prepared byusing oxidant/monomer molar ratio 1.25 shows the conductivity of 2.8 × 10–7 S cm–1. Newsubstitution pattern shown by FTIR spectroscopic analysis combined with MNDO-PM3 semiempiricalquantum chemical calculations revealed N─C2 coupling reactions as dominant. Theformation of phenazine rings in ladder structured polymerization products was observed by FTIRspectroscopy. The existence of a certain polyacriflavine crystalline structure was suggested from theSEM micrographs
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.555.503.pdf
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    Paper (German National Licenses)
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