In this study, water-soluble, narrow-band-gap polymers containing reactive groups were prepared by the addition-condensation of pyrrole (Pyr), benzaldehyde-2-sulfonic acid sodium salt (BS), and terephthalaldehydic acid (TPA) or -hydroxybenzaldehyde (-HB). TPA and -HB were used for the post-crosslinking reaction between polymers. The polymers were characterized by employing various analyses such as H-NMR, thermal gravimetric analysis (TGA), and UV-Vis-NIR. The values of polymers estimated from the absorption edges were 0.55 and 0.62 eV. The post-crosslinking reaction is important for preventing resolubilization and for developing an electron conducting route between the polymer chains. Herein, the post-crosslinked polymer was observed to maintain its narrow-band-gap and conductivity was increased 46 times compared to that observed before crosslinking.
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| http://dx.doi.org/10.3390/polym12020313 | DOI Listing |
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