Preparation of Polyaminopyridines Using a CuI/l-Proline-Catalyzed C-N Polycoupling Reaction

Polyaminopyridines (PAPy) were chemically prepared from amino-bromopyridines by a CuI/l-proline-catalyzed C-N polycondensation reaction. The formation of the polymer was confirmed by GPC, XRD, XRF, FTIR, UV-vis (λ(max) = 400 nm), (1)H and (13)C NMR. The number-average molecular weights (M(n)) were e...

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Autores principales: Reis, Lindomar A., Ligiéro, Carolina B. P., Andrade, Acácio A., Taylor, Jason G., Miranda, Paulo C. M. L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2012
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5449010/
http://dx.doi.org/10.3390/ma5112176
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author Reis, Lindomar A.
Ligiéro, Carolina B. P.
Andrade, Acácio A.
Taylor, Jason G.
Miranda, Paulo C. M. L.
author_facet Reis, Lindomar A.
Ligiéro, Carolina B. P.
Andrade, Acácio A.
Taylor, Jason G.
Miranda, Paulo C. M. L.
author_sort Reis, Lindomar A.
collection PubMed
description Polyaminopyridines (PAPy) were chemically prepared from amino-bromopyridines by a CuI/l-proline-catalyzed C-N polycondensation reaction. The formation of the polymer was confirmed by GPC, XRD, XRF, FTIR, UV-vis (λ(max) = 400 nm), (1)H and (13)C NMR. The number-average molecular weights (M(n)) were estimated by end-group analysis using X-ray fluorescence (up to 6000 Da). TGA analysis of PAPy with higher M(n) showed greater thermal stability up to 170 (o)C. Viscosity measurements of polymer in formic acid at 30 (o)C indicated a polyelectrolyte nature of PAPy solutions. Furthermore, the amorphicity of the material was observed by X-ray diffraction analysis.
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spelling pubmed-54490102017-07-28 Preparation of Polyaminopyridines Using a CuI/l-Proline-Catalyzed C-N Polycoupling Reaction Reis, Lindomar A. Ligiéro, Carolina B. P. Andrade, Acácio A. Taylor, Jason G. Miranda, Paulo C. M. L. Materials (Basel) Article Polyaminopyridines (PAPy) were chemically prepared from amino-bromopyridines by a CuI/l-proline-catalyzed C-N polycondensation reaction. The formation of the polymer was confirmed by GPC, XRD, XRF, FTIR, UV-vis (λ(max) = 400 nm), (1)H and (13)C NMR. The number-average molecular weights (M(n)) were estimated by end-group analysis using X-ray fluorescence (up to 6000 Da). TGA analysis of PAPy with higher M(n) showed greater thermal stability up to 170 (o)C. Viscosity measurements of polymer in formic acid at 30 (o)C indicated a polyelectrolyte nature of PAPy solutions. Furthermore, the amorphicity of the material was observed by X-ray diffraction analysis. MDPI 2012-11-05 /pmc/articles/PMC5449010/ http://dx.doi.org/10.3390/ma5112176 Text en © 2012 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Reis, Lindomar A.
Ligiéro, Carolina B. P.
Andrade, Acácio A.
Taylor, Jason G.
Miranda, Paulo C. M. L.
Preparation of Polyaminopyridines Using a CuI/l-Proline-Catalyzed C-N Polycoupling Reaction
title Preparation of Polyaminopyridines Using a CuI/l-Proline-Catalyzed C-N Polycoupling Reaction
title_full Preparation of Polyaminopyridines Using a CuI/l-Proline-Catalyzed C-N Polycoupling Reaction
title_fullStr Preparation of Polyaminopyridines Using a CuI/l-Proline-Catalyzed C-N Polycoupling Reaction
title_full_unstemmed Preparation of Polyaminopyridines Using a CuI/l-Proline-Catalyzed C-N Polycoupling Reaction
title_short Preparation of Polyaminopyridines Using a CuI/l-Proline-Catalyzed C-N Polycoupling Reaction
title_sort preparation of polyaminopyridines using a cui/l-proline-catalyzed c-n polycoupling reaction
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5449010/
http://dx.doi.org/10.3390/ma5112176
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