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Optically induced charge-transfer in donor-acceptor-substituted p- and m- C2B10H12 carboranes

Author

Listed:
  • Lin Wu

    (Northwestern Polytechnical University (NPU))

  • Marco Holzapfel

    (Julius-Maximilians-Universität Würzburg)

  • Alexander Schmiedel

    (Julius-Maximilians-Universität Würzburg)

  • Fuwei Peng

    (Northwestern Polytechnical University (NPU))

  • Michael Moos

    (Julius-Maximilians-Universität Würzburg)

  • Paul Mentzel

    (Julius-Maximilians-Universität Würzburg)

  • Junqing Shi

    (Northwestern Polytechnical University (NPU))

  • Thomas Neubert

    (Julius-Maximilians-Universität Würzburg)

  • Rüdiger Bertermann

    (Julius-Maximilians-Universität Würzburg)

  • Maik Finze

    (Julius-Maximilians-Universität Würzburg)

  • Mark A. Fox

    (University of Durham)

  • Christoph Lambert

    (Julius-Maximilians-Universität Würzburg)

  • Lei Ji

    (Northwestern Polytechnical University (NPU))

Abstract

Icosahedral carboranes, C2B10H12, have long been considered to be aromatic but the extent of conjugation between these clusters and their substituents is still being debated. m- and p-Carboranes are compared with m- and p-phenylenes as conjugated bridges in optical functional chromophores with a donor and an acceptor as substituents here. The absorption and fluorescence data for both carboranes from experimental techniques (including femtosecond transient absorption, time-resolved fluorescence and broadband fluorescence upconversion) show that the absorption and emission processes involve strong intramolecular charge transfer between the donor and acceptor substituents via the carborane cluster. From quantum chemical calculations on these carborane systems, the charge transfer process depends on the relative torsional angles of the donor and acceptor groups where an overlap between the two frontier orbitals exists in the bridging carborane cluster.

Suggested Citation

  • Lin Wu & Marco Holzapfel & Alexander Schmiedel & Fuwei Peng & Michael Moos & Paul Mentzel & Junqing Shi & Thomas Neubert & Rüdiger Bertermann & Maik Finze & Mark A. Fox & Christoph Lambert & Lei Ji, 2024. "Optically induced charge-transfer in donor-acceptor-substituted p- and m- C2B10H12 carboranes," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47384-4
    DOI: 10.1038/s41467-024-47384-4
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