@article{Siebler2011-04-11Oligo-13939,
  year={2011},
  doi={10.1002/chem.201002101},
  title={Oligonuclear ferrocene amides : mixed-valent peptides and redox-switchable foldamers},
  number={16},
  volume={17},
  issn={0947-6539},
  journal={Chemistry - A European Journal},
  pages={4540--4551},
  author={Siebler, Daniel and Linseis, Michael and Gasi, Teuta and Carella, Luca M. and Winter, Rainer F. and Förster, Christoph and Heinze, Katja}
}

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    <dc:creator>Linseis, Michael</dc:creator>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-07-06T13:37:22Z</dcterms:available>
    <dc:contributor>Carella, Luca M.</dc:contributor>
    <dc:creator>Heinze, Katja</dc:creator>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-07-06T13:37:22Z</dc:date>
    <dc:contributor>Heinze, Katja</dc:contributor>
    <dc:rights>terms-of-use</dc:rights>
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    <dc:creator>Förster, Christoph</dc:creator>
    <dcterms:issued>2011-04-11</dcterms:issued>
    <dc:contributor>Linseis, Michael</dc:contributor>
    <dc:contributor>Förster, Christoph</dc:contributor>
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    <dc:contributor>Siebler, Daniel</dc:contributor>
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    <dcterms:title>Oligonuclear ferrocene amides : mixed-valent peptides and redox-switchable foldamers</dcterms:title>
    <dcterms:bibliographicCitation>Publ. in: Chemistry : a European journal 17 (2011), 16, pp. 4540–4551</dcterms:bibliographicCitation>
    <dc:creator>Gasi, Teuta</dc:creator>
    <dc:contributor>Gasi, Teuta</dc:contributor>
    <dcterms:abstract xml:lang="eng">Trinuclear ferrocene tris-amides were synthesized from an Fmoc- or Boc-protected ferrocene amino acid, and hydrogen-bonded zigzag conformations were determined by NMR spectroscopy, molecular modelling, and X-ray diffraction. In these ordered secondary structures orientation of the individual amide dipole moments approximately in the same direction results in a macrodipole moment similar to that of α-helices composed of α-amino acids. Unlike ordinary α-amino acids, the building blocks in these ferrocene amides with defined secondary structure can be sequentially oxidized to mono-, di-, and trications. Singly and doubly charged mixed-valent cations were probed experimentally by Vis/NIR, paramagnetic 1H NMR and Mössbauer spectroscopy and investigated theoretically by DFT calculations. According to the appearance of intervalence charge transfer (IVCT) bands in solution, the ferrocene/ferrocenium amides are described as Robin–Day class II mixed-valent systems. Mössbauer spectroscopy indicates trapped valences in the solid state. The secondary structure of trinuclear ferrocene tris-amides remains intact (coiled form) upon oxidation to mono- and dications according to DFT calculations, while oxidation to the trication should break the intramolecular hydrogen bonding and unfold the ferrocene peptide (uncoiled form).</dcterms:abstract>
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    <dc:creator>Winter, Rainer F.</dc:creator>
    <dc:contributor>Winter, Rainer F.</dc:contributor>
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    <dc:creator>Carella, Luca M.</dc:creator>
    <dc:language>eng</dc:language>
    <dc:creator>Siebler, Daniel</dc:creator>
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