Abstract
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The -electron delocalisation in conjugated thienylenevinylenes bearing arylethenyl chromophores,
makes those materials interesting candidates for electro-optic applications. In this study, we
report the results of electrochemical and UV–Vis/ESR spectroelectrochemical studies of a pair of
thienylenevinylenes substituted by the 4-cyanostyryl group, bearing either a hydrogen, or methyl group
terminated carbons at the peripheral thiophene rings. The reactivity of various functional segments of
investigated molecules was assessed by comparing the reactivity of the protected and unprotected counterparts
and the behaviour of their electrooxidation products. For the capped derivative, two irreversible
anodic redox processes giving electrochemically inactive products were observed, while the uncapped
molecule yields electroactive materials already upon its first oxidation step.