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Issue 13, 2018

Lycopene crystalloids exhibit singlet exciton fission in tomatoes

Author affiliations

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

Supplementary files

Article information


Submitted
18 Dec 2017
Accepted
07 Mar 2018
First published
08 Mar 2018

Phys. Chem. Chem. Phys., 2018,20, 8640-8646
Article type
Paper

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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