Photophysical properties of flavonoids extracted from Syngonanthus nitens, the golden grass

Dry stems of Syngonanthus nitens, a plant of the Euriocaulaceae species, present exquisite golden shine, originated from flavonoids residing at S. nitens stem epidermis. We report here on the optical properties of flavonoids extracted, in different solvents, from dry stems of the plant. The extracts...

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Bibliographic Details
Published in:Journal of luminescence 2018-02, Vol.194, p.394-400
Main Authors: Berlim, Leonardo Schneider, Bezerra, Arandi Ginane, Pazin, Wallance Moreira, Ramin, Thiago Siqueira, Schreiner, Wido Herwig, Ito, Amando Siuiti
Format: Article
Language:English
Subjects:
Absorption
Flavonoid
Fluorescence
Photophysical properties
Proton transfer
Syngonanthus nitens
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Summary:Dry stems of Syngonanthus nitens, a plant of the Euriocaulaceae species, present exquisite golden shine, originated from flavonoids residing at S. nitens stem epidermis. We report here on the optical properties of flavonoids extracted, in different solvents, from dry stems of the plant. The extracts were analyzed by UV–Vis absorption and fluorescence emission spectroscopies, and data were obtained in solvents of different polarity and in aqueous media at different pHs. Time-resolved fluorescence experiments, made using single photon detection technique, fluorescence correlation spectroscopy and fluorescence anisotropy measurements were also employed to study flavonoid/solvent and flavonoid/flavonoid interactions. A consistent picture of the S. nitens flavonoid photophysical behavior and their interaction via proton transfer in aqueous suspension is obtained. The results are important to understand the photophysical process involving flavonoids in general. [Display omitted]
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2017.10.040