Poly[1,5-naphthyridine-(3-hexylthiophene)], possible smart functional polymer, was synthesized, by both conventional as well as microwave techniques, through synthesizing a series of intermediates. FTIR analysis of spectrum shows prominent peaks of C=C and C-S bonds. Raman spectrum also have very distinct peaks for C-C, C=N and C-S bonds. The FESEM shows a uniform structure of the synthesized polymer. UV-Vis analysis was performed for the calculation optical band gap of semiconductor that was found about 2.26 eV with λmax at 378 nm. TGA analysis showed that the synthesized polymer is stable until almost 200 °C and then start decomposing linearly. GPC analysis of the polymer showed the polydispersity index of 1.145 and Mw 892. The electrochemical and transport properties of the polymer were investigated both in the bulk as well as in thin film form. Cyclic voltammetry (CV) measurements of the polymer were conducted using a potentiostat coupled with an electrochemical cell. The CV results of polymer as a thin film exhibited two prominent single oxidation peaks. The aim of this work was to prepare the new quinoline based regioregular polythiophenes (RPTs) using microwave assisted synthesis via 2,6-Dibromo-1,5-naphthyridine as a key intermediate. The new semi-conducting materials will have several applications such as field-effect transistors, sensors, light-emitting diodes (LEDs), rechargeable batteries, smart cards, and non-linear optical materials.

Synthesis of polythiophene as a possible smart functional polymer

253rd National Meeting (2017)

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