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1 Polish Journal of Applied Chemistry

1 2009

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Studies on azobenzene chromophores content and its localization in functionalized poly(esterimide)s

Wanic A., Siwy M., Schab-Balcerzak E.

Polish Journal of Applied Chemistry

2009

Vol. 53, nr 4

277-294

In this article determination of azobenzene chromophore content in poly(esterimide)s by 13C NMR spectroscopy was reported for the first time. Azopolymers were obtained by a posf-azo-coupling reaction. The chemical shifts of carbon atoms signal characteristic for evaluation of chromophores load level in polymers were established based on analysis of several proper compounds. It was found that the most important for such analysis are the ranges 147-155 ppm and 112-116 ppm in 13C NMR spectrum. The calculated degree of poly(estrimide)s dye functionalization was compared with results estimated from UV-Vis spectroscopy and were in good agreement. The obtained results led to conclusion that 13C NMR spectroscopy is useful tool for determination chromophore content and moreover its localization in polymer. The elaborated method could be applied not only for polymers investigated in this work but also for all polyimides functionalized by azobenzene derivatives.