Abstract
The newly synthesized oligo(1,4-phenylenevinylene) series 2a– d with bis(2-hexyloctyl)amino groups as electron donors and 2,2-dicyanovinyl groups as electron acceptors represents conjugated oligomers with strong push–pull effects. Due to the decrease of the intramolecular charge transfer with increasing numbers of repeat units ( n=1–4), the long-wavelength transition shows a particularly great hypsochromic shift for the extension of the chromophore.
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