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• W2032073663 abstract "The π-conjugated polymers poly-1 and poly-2 composed of vinylogous tetrathiafulvalene (TTF) units were obtained by electrochemical polymerization of 2,5-di(benzylidene)-1,3,4,6-tetrathiapentalene (1) or of its corresponding dimer 1,2-bis(5-benzylidene[1,3]-dithiolo[4,5-d]1,3-dithiole-2-ylidene)-1,2-diphenylethane (2). The polymers were characterized by cyclic voltammetry (CV), in situ ESR spectroscopy and in situ conductivity measurements to gain insight into the charge−discharge behavior and the electronic properties as a function of applied potential. Our results suggest that both compounds behave as conducting polymers exhibiting multistep redox activity. In situ ESR studies show that charge−discharge phenomena differ in the nature of the charge storage configuration depending on whether they are investigated during a cathodic or anodic scan. Reduction of a polymer film generated at an applied potential of +1.6 V vs SCE allows for the detection of three clearly discernible maxima of the spin density at 0.60, 0.95, and about 1.25 V vs Ag, while subsequent reoxidation gives rise to only one spin density maximum at around 0.65 V vs Ag. Coulometric studies suggest that the spin density maximum at around 0.60−0.65 V vs Ag is associated with one positive charge per tetrathiapentalene unit of poly-1 while each monomer bears up to two charges at a potential of 1.6 V vs Ag. In situ and conventional four-probe measurements of the electrical conductivity gave values of around 5 × 10-5 S cm-1." @default.
• W2032073663 created "2016-06-24" @default.
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• W2032073663 date "2002-06-07" @default.
• W2032073663 modified "2023-09-25" @default.
• W2032073663 title "Poly(dibenzylidenetetrathiapentalene): A Redox-Active, Linearly Extended TTF Polymer" @default.
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• W2032073663 doi "https://doi.org/10.1021/jp014101a" @default.
• W2032073663 hasPublicationYear "2002" @default.
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