Category Archives: Faraday Discuss

Conical epidermal cells cause velvety colouration and enhanced patterning in Mandevilla flowers.

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Conical epidermal cells cause velvety colouration and enhanced patterning in Mandevilla flowers.
Faraday Discuss. 2020 Jul 28;:
Authors: Stavenga DG, Staal M, van der Kooi CJ
Abstract
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Biophotonics of diversely coloured peacock tail feathers.

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Biophotonics of diversely coloured peacock tail feathers.
Faraday Discuss. 2020 Jul 28;:
Authors: Freyer P, Stavenga DG
Abstract
Peacock feathers feature a rich gamut of colours, cr… Continue reading

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Intramolecular photostabilization via triplet-state quenching: design principles to make organic fluorophores “self-healing”.

Intramolecular photostabilization via triplet-state quenching: design principles to make organic fluorophores “self-healing”.

Faraday Discuss. 2015 Oct 9;

Authors: van der Velde JH, Uusitalo JJ, Ugen LJ, Warszawik EM, Herrmann A, Marrink SJ, Cordes T

Abstract
Covalent linkage of fluorophores and photostabilizers was recently revived as a strategy to make organic fluorophores “self-healing” via triplet-state quenching. Although Lüttke and co-workers pioneered this strategy already in the 1980s, the general design principles still remain elusive. In this contribution, we combine experiments and theory to understand what determines the photostabilization efficiency in dye-photostabilizer conjugates. Our results from single-molecule microscopy and molecular dynamics simulations of different Cy5-derivatives suggest that the distance and relative geometry between the fluorophore and photostabilizer are more important than the chemical nature of the photostabilizer, e.g. its redox potential, which is known to influence electron-transfer rates. We hypothesize that the efficiency of photostabilization scales directly with the contact rate of the fluorophore and photostabilizer. This study represents an important step in the understanding of the molecular mechanism of intramolecular photostabilization and can pave the way for further development of stable emitters for various applications.

PMID: 26449795 [PubMed – as supplied by publisher]

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