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Issue 21, 2019
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Tuning the optical properties of spiro-centered charge-transfer dyes by extending the donor or acceptor part

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Abstract

Charge-transfer-based materials with intramolecular donor–acceptor structure are widely used in technological applications. A separation of donor and acceptor through a tetrahedral spiro center leads to a rigid orthogonal arrangement. Furthermore, spiroconjugation can enhance efficient charge transfer. We herein present the syntheses, structural, electrochemical and optical properties of spiro-based CT compounds with diamine donors and diketone acceptors supported by TDDFT calculations. All compounds showed strong charge transfer in their absorbance spectra. Extending the acceptor or donor part of these compounds led to materials with emissions from the CT states. These results can aid the future design of spiro-DA-compounds towards achieving the desired optical properties.

Graphical abstract: Tuning the optical properties of spiro-centered charge-transfer dyes by extending the donor or acceptor part

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Publication details

The article was received on 12 Sep 2019, accepted on 29 Sep 2019 and first published on 30 Sep 2019


Article type: Research Article
DOI: 10.1039/C9QO01134J
Org. Chem. Front., 2019,6, 3649-3656

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    Tuning the optical properties of spiro-centered charge-transfer dyes by extending the donor or acceptor part

    J. S. Wössner, D. C. Grenz, D. Kratzert and B. Esser, Org. Chem. Front., 2019, 6, 3649
    DOI: 10.1039/C9QO01134J

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