@article{Breimaier2021-09-07Elect-54434,
  year={2021},
  doi={10.1002/ejoc.202100476},
  title={Electrochemical and Spectroscopic Studies on Triarylamine‐Polychlorotriphenylmethyl Dyads with Particularly Strong Triarylamine Donors},
  number={33},
  volume={2021},
  issn={1434-243X},
  journal={European Journal of Organic Chemistry},
  pages={4690--4700},
  author={Breimaier, Stefanie and Winter, Rainer F.}
}

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    <dc:language>eng</dc:language>
    <dc:contributor>Winter, Rainer F.</dc:contributor>
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    <dc:creator>Breimaier, Stefanie</dc:creator>
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    <dc:contributor>Breimaier, Stefanie</dc:contributor>
    <dcterms:title>Electrochemical and Spectroscopic Studies on Triarylamine‐Polychlorotriphenylmethyl Dyads with Particularly Strong Triarylamine Donors</dcterms:title>
    <dc:creator>Winter, Rainer F.</dc:creator>
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    <dcterms:abstract xml:lang="eng">We present two new donor-acceptor dyads composed of a polychlorotriphenylmethyl radical ( PTM • ) as the acceptor (A) and 4,4’-bis(dimethylamino)triphenylamine ( TPAN ) or 2,2’:6’,2’’:6’’,6-trioxytriphenylamine ( TOTA ) as particularly electron-rich triarylamine ( TAA ) donors (D). We assessed their electrochemical properties and electronic structures by cyclic voltammetry, UV/vis/NIR spectroscopy, EPR spectroscopy and quantum chemical calculations. By establishing the spectroscopic fingerprints of the oxidized and reduced forms, we probe for the possible coexistence of a zwitterionic TAA + -PTM - valence tautomer (VT), besides neutral TAA-PTM • . UV/vis/NIR and EPR spectroscopic studies at variable temperature and in various solvents however provide no indication for such equilibria. Quantitative spin counting experiments by EPR spectroscopy and quantum chemical calculations indicate that the one-electron oxidized forms of these dyads possess an open-shell singlet ground state which is energetically slightly below the triplet state</dcterms:abstract>
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