Photoinduced protonation of polyaniline assisted by hydrogen-bonding materials
Abbreviated Journal Title
Polyaniline; Hydrogen bonding; Poly(vinyl alcohol); Photo-acid; generator; Conductivity; TRACELESS REMOVABLE GROUP; THEORETICAL INVESTIGATIONS; CONDUCTING; POLYANILINE; ELECTRONIC INFLUENCES; ALCOHOL) COMPOSITE; DOPED; POLYANILINE; EMERALDINE FORM; ACID; TRANSITION; FILMS; Materials Science, Multidisciplinary; Physics, Condensed Matter; Polymer; Science
Composites of the emeraldine base form of polyaniline (PANI-EB) and photo-acid generators (PAGs) increase their conductivities upon photo-irradiation due to protonation of PANI-EB. Such materials may be utilized to fabricate conducting patterns by photo-irradiation. However, the conductivity obtained by direct irradiation of PANI-EB/PAG composites was normally quite low, and conductivity above 10(-3) S cm(-1) often required post-treatment with HCI. In this work, poly(vinyl alcohol) (PVA), which can form a hydrogen bonding network, was added to PANI-EB/PAG. Results showed that PVA enhanced film quality, conductivity and reproducibility. Photo-induced conductivity of 10(-2) S cm(-1) was obtained when the ratio of PANI-EB/PVA/PAG was 1:1:0.6. A novel PAG, bis(p-hydroxyphenyl)phenylsulfoniumtriflate [(PhOH)(2)PhS(+) OTf(-)], which can form hydrogen bonds with PANI was synthesized and mixed with PANI-EB. A composite of PANI-EB and the PAG with a ratio of 1:0.5 achieved a conductivity of 10(-1) S cm(-1) after irradiation. However, the initial conductivity before irradiation was as high as 10(-5) S cm(-1) due to relatively high acidity of the PAG. (C) 2011 Elsevier B.V. All rights reserved.
"Photoinduced protonation of polyaniline assisted by hydrogen-bonding materials" (2011). Faculty Bibliography 2010s. 1904.