Sulfurization of polymers. 5. Poly(6-methyl-5-sulfanylthieno[2,3-b]pyridine-4-thione), poly(thieno[2,3-b]azepine-4,5(6H)-dithione), and related structures from poly(2-methyl-5-vinylpyridine) and elemental sulfur |
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| Authors: | Trofimov B A Mal"kina A G Sokolyanskaya L V Nosyreva V V Myachina G F Korzhova S A Rodionova I V Vakul"skaya T I Klyba L V Stoyanov E S Skotheim T A Mikhailik Yu V |
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| Institution: | (1) Siberian Branch of the Russian Academy of Sciences, A. E. Favorsky Irkutsk Institute of Chemistry, 1 ul. Favorskogo, 664033 Irkutsk, Russian Federation;(2) Siberian Branch of the Russian Academy of Sciences, G. K. Boreskov Institute of Catalysis, 5 prosp. Akad. Lavrent"eva, 630090 Novosibirsk, Russian Federation;(3) Moltech Corporation, 9062 South Rita Road, Tucson, Arizona, USA |
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| Abstract: | Poly(2-methyl-5-vinylpyridine) is sulfurized with elemental sulfur at 140—320 °C to release hydrogen sulfide and to give black lustrous powders (sulfur content up to 45%) possessing electric conductivity (6.4·10–11—1.6·10–7 S cm–1), paramagnetism (spin concentration 6.2·1018—5.0·1019 sp g–1, g = 2.0043—2.0046,  H = 0.49—0.58 mT), and redox and complex-forming properties. Elemental analysis data, IR, ESR, and mass spectra, DSC and TGA data, electric conductivity, electrochemical activity and chemical properties (salt formation and complexation) of the materials synthesized correspond to cross-liked poly(6-methyl-5-sulfanylthieno2,3-b]pyridine-4-thione), poly(thieno2,3-b]azepine-4,5(6H)-dithione), and related structures. |
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| Keywords: | poly(2-methyl-5-vinylpyridine) elemental sulfur sulfurization polythienepyridine polythieneazepine electric conductivity paramagnetism complexation electrochemical activity |
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