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 (λmax = 400 nm), 1H and 13C NMR. The number-average molecular weights (Mn) were estimated...

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Bibliographic Details
Published inMaterials Vol. 5; no. 11; pp. 2176 - 2189
Main Authors Reis, Lindomar, Ligiéro, Carolina, Andrade, Acácio, Taylor, Jason, Miranda, Paulo
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.11.2012
MDPI
Subjects
Batteries
Catalysis
Copper
end-group analysis by XRF
Ligands
Palladium
polyaminopyridines
Polymerization
Polymers
Solvents
Ullmann coupling reaction
Brazil
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Summary: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.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma5112176