Comparative study of chemically synthesized and plasma polymerized pyrrole and thiophene thin films

Pyrrole thin films deposited on paper by pulsed RF plasma

“…This is very likely due to the unstable nature of the charge transfer complex with the dopant (iodine) resulting in a greater ease of diffusion of the iodine from the film. These results are in good agreement with those reported for plasma polymerization of pyrrole by Cruz et al [18] and Wang et al [19]. Moreover, it was proposed by Wang and his group [19] that the structures of plasma polymerized pyrrole are rather different from those of the polymers synthesized by conventional chemical methods, due to a higher degree of crosslinking and branching reactions in plasma polymerization.…”

Polypyrrole-modified starch films: structural, thermal, morphological and electrical characterization

“…The spectra e of Figure 3 (polypyrrole powder synthesized with FeCl 3 , so called PPy-Cl) contains bands at 1540 cm −1 (C-C stretching vibrations in pyrrole ring) [25], at 1459 cm -1 (C-N stretching vibration in the ring) [25]; from 1400 cm -1 to 1250 cm -1 (broad band, C-H or C-N in-plane deformation modes of secondary aromatic amines) [25,42], bands from 1250 to 1100 cm -1 (vibrations of the pyrrole ring) [25], characteristic for oxidized polypyrrole. Vibrations from 1130 cm -1 to 1000 cm -1 (C-H and N-H in plane deformation vibrations) and the band at 1700 cm -1 are influenced by C-O vibration of hydroxypyrrole units formed by nucleophilic attack of water during the preparation [25].…”

Plasma Deposition of Thiophene Derivatives Under Atmospheric Pressure

“…If the substrate is conductive, this problem can be solved by using electropolymerization with deposition directly on the substrate. Nevertheless, both chemical and electrochemical synthesis, are Plasma polymerizations of thiophene and derivatives at low pressure have already been reported [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] . However, since this technique requires a high vacuum, it can only be done in a batch process.…”