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Issue 13, 2019
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Light triggers molecular shuttling in rotaxanes: control over proximity and charge recombination

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Abstract

We present the synthesis of novel rotaxanes based on mechanically interlocked porphyrins and fullerene and their advanced investigations by means of photophysical measurements. To this end, a fullerene-capped dumbbell-type axle containing a central triazole was threaded through strapped (metallo)porphyrins—either a free-base or a zinc porphyrin. Femtosecond-resolved transient absorption measurements revealed charge-separation between the porphyrin and fullerene upon light excitation. Solvent polarity and solvent coordination effects induced molecular motion of the rotaxanes upon charge separation and enabled, for the first time, subtle control over the charge recombination by enabling and controlling the directionality of shuttling.

Graphical abstract: Light triggers molecular shuttling in rotaxanes: control over proximity and charge recombination

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Publication details

The article was received on 29 Nov 2018, accepted on 27 Feb 2019 and first published on 27 Feb 2019


Article type: Edge Article
DOI: 10.1039/C8SC05328F
Chem. Sci., 2019,10, 3846-3853
  • Open access: Creative Commons BY-NC license
    All publication charges for this article have been paid for by the Royal Society of Chemistry

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    Light triggers molecular shuttling in rotaxanes: control over proximity and charge recombination

    M. Wolf, A. Ogawa, M. Bechtold, M. Vonesch, J. A. Wytko, K. Oohora, S. Campidelli, T. Hayashi, D. M. Guldi and J. Weiss, Chem. Sci., 2019, 10, 3846
    DOI: 10.1039/C8SC05328F

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