Synthesis and Characterization of Electrochromic, Sensor and Processable Polymers Based on Alkylenedioxythiophene

Poly(3,4-ethylenedioxythiophene) (PEDOT) possesses many interesting properties. We have attempted to improve the properties like contrast, switching time and processability so as to use this polymer in devices. High contrast and rapid switching electrochromic polymers were designed, synthesized and characterized. A dibenzyl substituted poly(3,4-propylenedioxythiophene) exhibited a contrast of 89% and the polymer switches between its opaque blue to transparent blue colors in 400 ms. A highly specific DNA sensor that can detect the complementary ssDNA concentration as low as 80 ng/ml was designed and fabricated using PEDOT as a transducer in conductimetric sensor. Electrochemical synthesis of fully sulfonated poly(3,4-ethylenedioxythiophene) and polypyrrole was carried out by using a mixed solvent approach. Fully sulfonated polyaniline was electrochemically synthesized by the polymerization of metanillic acid in acetonitrile and water mixture at 5?aC. This polymer was electroactive from pH1 to pH 7. More Info

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