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Issue 25, 2018
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Redox-driven porphyrin based systems for new luminescent molecular switches

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Abstract

In this work, we explore the possibility of tuning the fluorescence intensity of two porphyrin systems through the electrochemical oxidation of an appended ruthenium acetylide bridge. Two electrochemically switchable systems, a dyad (ZnP-Ru, 3) and a triad (ZnP-Ru-P2H, 5), were prepared and investigated. In the ZnP-Ru dyad, the fluorescence of the zinc porphyrin was switched reversibly between the ON and OFF state upon the oxidation of the ruthenium unit, the most probable quenching process involved after oxidation being the electron transfer from the singlet excited state of ZnP to the oxidized ruthenium center. In the ZnP-Ru-P2H triad, we show that both porphyrins’ fluorescence are highly quenched independent of the redox state of the ruthenium bridge owing to the efficient photoinduced charge transfer within the ruthenium complex.

Graphical abstract: Redox-driven porphyrin based systems for new luminescent molecular switches

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Publication details

The article was received on 16 Apr 2018, accepted on 25 May 2018 and first published on 25 May 2018


Article type: Paper
DOI: 10.1039/C8DT01493K
Citation: Dalton Trans., 2018,47, 8364-8374
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    Redox-driven porphyrin based systems for new luminescent molecular switches

    L. Norel, C. Tourbillon, J. Warnan, J. Audibert, Y. Pellegrin, F. Miomandre, F. Odobel and S. Rigaut, Dalton Trans., 2018, 47, 8364
    DOI: 10.1039/C8DT01493K

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