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Making more electron‐deficient oligothiophene vinylenes (OTVs) by selective oxidation of the sulfur atoms converts them into significantly more π‐conjugated molecules, with enhanced inter‐ring/exocyclic π‐conjugation and, concomitantly, with enhanced optical features. This unique oxidation of OTVs leaves the surrounding electron‐rich olefins intact. A comparison of these [all]‐S,S‐dioxide oligothienylene‐vinylenes...
Oligo‐S,S‐dioxothienylenevinylenes have been prepared by transferring oxygen atoms to the sulfur atoms using the HOF⋅CH3CN complex. Their photophysical properties are presented in comparison with their thiophenevinylene congeners. Together with their vibrational properties and molecular force fields, this study allows for the interpretation of the alteration of aromaticity and inter‐ring exocyclic...
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