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Materials 2012, 5(11), 2176-2189; doi:10.3390/ma5112176
Article

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

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Received: 2 August 2012 / Revised: 10 October 2012 / Accepted: 1 November 2012 / Published: 5 November 2012
(This article belongs to the Special Issue Conjugated Polymers)
Download PDF [294 KB, 6 November 2012; original version 5 November 2012]

Abstract

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 (λmax = 400 nm), 1H and 13C NMR. The number-average molecular weights (Mn) were estimated by end-group analysis using X-ray fluorescence (up to 6000 Da). TGA analysis of PAPy with higher Mn showed greater thermal stability up to 170 oC. Viscosity measurements of polymer in formic acid at 30 oC indicated a polyelectrolyte nature of PAPy solutions. Furthermore, the amorphicity of the material was observed by X-ray diffraction analysis.
Keywords: polyaminopyridines; Ullmann coupling reaction; end-group analysis by XRF polyaminopyridines; Ullmann coupling reaction; end-group analysis by XRF
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Reis, L.A.; Ligiéro, C.B.P.; Andrade, A.A.; Taylor, J.G.; Miranda, P.C.M.L. Preparation of Polyaminopyridines Using a CuI/l-Proline-Catalyzed C-N Polycoupling Reaction. Materials 2012, 5, 2176-2189.

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