In situ Raman and UV–vis spectroscopic studies of polypyrrole and poly(pyrrole-2,6-dimethyl-β-cyclodextrin)

A novel, rapid synthetic protocol for controllable sizes, conductivities and monomer units of soluble polypyrrole

“…The band at k max = 331 nm is due to strong p ? p ⁄ transitions [43] while the broad band at 540 nm is from the highest energy polaron transitions [44]. From Fig.…”

Conductive polypyrrole composite films prepared using wet cast technique with a pyrrole-cellulose acetate solution

“…It was noted that the broaden band was observed around 500-700 nm in the spectra indicating that the PPy had bipolaron transition band on the CA scaffold film. This result suggests that the PPy interacted with dopant of Cl 2 [32]. The peak intensity of the p ?…”

Investigation of corrosion protection performance of poly(N-methylpyrrole)-dodecylsulfate/multi-walled carbon nanotubes composite coatings on the stainless steel

“…The band at 1138 cm À1 corresponds to the NeH stretching vibration in polymer [50,55]. The bands at 1053 cm À1 and 888, 777 cm À1 are ascribed to the in-plane and out-of-plane CeH bending motions of the aromatic rings, respectively [50,53,54,56,57]. The band at approximately 1536 cm À1 is pertained to the C¼C and/or CeC stretching vibration in the N-methylpyrrole ring [50].…”

“…In the spectrum of PNMPy ( Fig. 6(a)), the band appearing at 1432 cm À1 presents the C¼C/CeC or CeN stretching vibrations for the N-methylpyrrole ring [50]. The band at about 1366 cm À1 may be assigned to the ring stretch of the N-methylpyrrole unit [51,52].…”

“…The band at about 1317 cm À1 may be related to the CeN stretching vibration in the N-methylpyrrole ring and CeH in-plane bending motions of the aromatic rings [50,53e55]. The band at 1138 cm À1 corresponds to the NeH stretching vibration in polymer [50,55]. The bands at 1053 cm À1 and 888, 777 cm À1 are ascribed to the in-plane and out-of-plane CeH bending motions of the aromatic rings, respectively [50,53,54,56,57].…”