Enhancing electrochromic properties of polypyrrole by silsesquioxane nanocages |
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Authors: | Metin Ak Burcin Gacal Baris Kiskan Yusuf Yagci Levent Toppare |
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Affiliation: | 1. Middle East Technical University, Department of Chemistry, 06531 Ankara, Turkey;2. Pamukkale University, Department of Chemistry, 20017 Denizli, Turkey;3. Istanbul Technical University, Department of Chemistry, Maslak, Istanbul 80626, Turkey |
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Abstract: | A new monomer, octa(thiophenephenyl)silsesquioxane (OThiophenePS) was synthesized via click chemistry. The chemical structure of OThiophenePS was characterized by nuclear magnetic resonance (1H NMR) and Fourier transform infrared (FT-IR) spectroscopies. Electrochemical polymerization of pyrrole with OThiophenePS was performed resulting in polypyrrole-attached, polyhedral oligomeric silsesquioxane (OPS–PPy). The spectroelectrochemical studies show that the electrochromic properties of (OPS–PPy) are superior to those of polypyrrole (PPy). This 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 PPy chains. |
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