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Polyelectrochromic Vinyl Ruthenium-Modified Tritylium Dyes

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2017

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https://doi.org/10.1021/acs.organomet.7b00194
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Organometallics. 2017, 36(10), pp. 1993-2003. ISSN 0276-7333. eISSN 1520-6041. Available under: doi: 10.1021/acs.organomet.7b00194

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A series of four mononuclear and one dinuclear ruthenium styryl complexes with redox active triarylmethylium ligands were prepared. All new compounds were characterized by NMR spectroscopy, MS spectrometry, cyclic voltammetry, and in various oxidation states by IR and UV/vis/NIR and EPR spectroscopy. The increase in conjugation length by the introduction of the vinyl ruthenium entity pushes the electronic absorption to low energy, almost into the near-infrared region. Electrochemical and spectroscopic properties are strongly influenced by the para substituents at the triarylmethylium ligands. The complexes were characterized in up to four different oxidation states up to the trication level and show pronounced electrochromism. The oxidized mixed-valent diruthenium complex 52+ shows a moderate degree of charge and spin delocalization over the styryl ruthenium sites.

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ISO 690OSSWALD, Steffen, Stefanie BREIMAIER, Michael LINSEIS, Rainer F. WINTER, 2017. Polyelectrochromic Vinyl Ruthenium-Modified Tritylium Dyes. In: Organometallics. 2017, 36(10), pp. 1993-2003. ISSN 0276-7333. eISSN 1520-6041. Available under: doi: 10.1021/acs.organomet.7b00194
BibTex
@article{Owald2017-05-22Polye-39341,
  year={2017},
  doi={10.1021/acs.organomet.7b00194},
  title={Polyelectrochromic Vinyl Ruthenium-Modified Tritylium Dyes},
  number={10},
  volume={36},
  issn={0276-7333},
  journal={Organometallics},
  pages={1993--2003},
  author={Oßwald, Steffen and Breimaier, Stefanie and Linseis, Michael and Winter, Rainer F.}
}
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    <dcterms:abstract xml:lang="eng">A series of four mononuclear and one dinuclear ruthenium styryl complexes with redox active triarylmethylium ligands were prepared. All new compounds were characterized by NMR spectroscopy, MS spectrometry, cyclic voltammetry, and in various oxidation states by IR and UV/vis/NIR and EPR spectroscopy. The increase in conjugation length by the introduction of the vinyl ruthenium entity pushes the electronic absorption to low energy, almost into the near-infrared region. Electrochemical and spectroscopic properties are strongly influenced by the para substituents at the triarylmethylium ligands. The complexes were characterized in up to four different oxidation states up to the trication level and show pronounced electrochromism. The oxidized mixed-valent diruthenium complex 5&lt;sup&gt;2+&lt;/sup&gt; shows a moderate degree of charge and spin delocalization over the styryl ruthenium sites.</dcterms:abstract>
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