Artículos de revistas
Preparation of Polyaminopyridines Using a CuI/L-Proline-Catalyzed C-N Polycoupling Reaction
Registro en:
Materials. Mdpi Ag, v. 5, n. 11, n. 2176, n. 2189, 2012.
1996-1944
WOS:000311426300008
10.3390/ma5112176
Autor
Reis, LA
Ligiero, CBP
Andrade, AA
Taylor, JG
Miranda, PCML
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) 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 (lambda(max) = 400 nm), H-1 and C-13 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 degrees C. Viscosity measurements of polymer in formic acid at 30 degrees C indicated a polyelectrolyte nature of PAPy solutions. Furthermore, the amorphicity of the material was observed by X-ray diffraction analysis. 5 11 2176 2189 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)