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Issue 13, 2018
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Lycopene crystalloids exhibit singlet exciton fission in tomatoes

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Abstract

Transient absorption studies conducted on in vitro lycopene aggregates, as well as on lycopene crystalloids inside tomato chromoplasts, reveal the appearance of a long-lived excited state, which we unambiguously identified as lycopene triplet. These triplet states must be generated by singlet exciton fission, which occurs from the lycopene 2Ag state. This is the first time the singlet fission process has ever been shown to occur in a biological material. We propose that the formation of carotenoid assemblies in chromoplasts may constitute a photoprotective process during chromoplast maturation, in addition to their function in signaling processes.

Graphical abstract: Lycopene crystalloids exhibit singlet exciton fission in tomatoes

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Publication details

The article was received on 18 Dec 2017, accepted on 07 Mar 2018 and first published on 08 Mar 2018


Article type: Paper
DOI: 10.1039/C7CP08460A
Citation: Phys. Chem. Chem. Phys., 2018,20, 8640-8646
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    Lycopene crystalloids exhibit singlet exciton fission in tomatoes

    M. J. Llansola-Portoles, K. Redeckas, S. Streckaité, C. Ilioaia, A. A. Pascal, A. Telfer, M. Vengris, L. Valkunas and B. Robert, Phys. Chem. Chem. Phys., 2018, 20, 8640
    DOI: 10.1039/C7CP08460A

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