Construction of a novel turn-on-off fluorescence sensor used for highly selective detection of thiamine via its quenching effect on o-phen-Zn2+ complex.
Luminescence
; 33(6): 1128-1135, 2018 Sep.
Article
em En
| MEDLINE
| ID: mdl-30004173
ABSTRACT
In this work, a simple and selective fluorescence sensor approach called 'turn-on-off' for the determination of thiamine (TM) has been developed. As known, the o-phenanthroline (o-phen) has inner fluorescence, though when reacted with zinc ions to form the o-phen-Zn2+ complex the fluorescence intensity was enhanced effectively, while upon addition of TM into the o-phen-Zn2+ complex solution, the intensity of the system was gently quenched, which was termed the 'turn-on-off' probe. Notably, the method possessed highly selective, sensitive determination for TM with a detection limit of 0.25 µmol L-1 and the reduced fluorescence intensity was proportional to the concentration of TM in the range 0.84-80.0 µmol L-1 . Besides, the proposed mechanism was also investigated through exploring the Fourier transform infrared (FT-IR), nuclear magnetic resonance (NMR) spectroscopy. Furthermore, this manner was successfully applied into practical samples for TM detection with satisfactory results.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Compostos Organometálicos
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Fenantrolinas
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Tiamina
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Zinco
/
Corantes Fluorescentes
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article