UV–VIS spectroscopic studies of one pot chemically synthesized polyindole/poly(vinyl acetate) composite films

Abstract This letter reports the UV–VIS spectroscopic studies of novel one pot synthesized polyindole/poly(vinyl acetate) (PIN/PVAc) composite films chemically using an oxidant nickel nitrate. The surface morphology of the prepared sample was analyzed through field emission scanning electron microscope (FE-SEM), which shows irregular, non-porous structure and spongy amorphous morphology. The UV–VIS spectroscopy was performed to study optical parameters of PIN/PVAc composite films. These polymeric composite films exhibited strong absorption below 250 nm with a well-defined absorption peak at around 225 nm. The optical band gap energy values of the prepared samples range over 3.924–5.146 eV. However, the maximum optical conductivity of PIN/PVAc composite film was found to be 2.92×10 8 s −1 at 350 nm.