Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 28, Issue 3, Pages 281-285Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200600717
Keywords
conjugated polymers; contrast; electrochromic; polyaniline; polyhedral oligomeric silsesquioxane (POSS)
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Copolymerization of aniline with octa(aminophenyl) silsesquioxane (OAPS) was performed, which resulted in polyaniline-tethered, polyhedral oligomeric silsesquioxane (POSS-PANI), with star-like molecular geometry. The spectro-electrochernical studies show that the electrochromic contrast of POSS-PANI is much higher than that of polyardline (PANI). The great improvement can be attributed to the more accessible doping sites and the facile ion movement during the redox switching, brought by the loose packing of the PANI chains. This was evidenced by a drastic increase in ionic conductivity, a decrease in the electrical conductivity, and a decrease in the crystallinity and crystal size, with the increase of the OAPS concentration in the POSS-PANI.
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