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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.

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