Dual-emission ratio fluorescence for selective and sensitive detection of ferric ions and ascorbic acid based on one-pot synthesis of glutathione protected gold nanoclusters.

ABSTRACT: A fluorometric method was proposed for the determination of Fe³⁺ and ascorbic acid (AA) based on blue and red dual fluorescence emissions of glutathione (GSH) stabilized-gold nanoclusters (AuNCs). AuNCs were synthesized from GSH and tetrachloroauric acid. The fluorescence peaks of AuNCs were at 425 nm and 585 nm, respectively. In the presence of Fe³⁺, the fluorescence peak at 425 nm can be enhanced and that at 585 nm can be quenched. There is a good linear relationship between the fluorescence intensity ratio for the 425 and 585 nm peaks (F ₄₂₅/F ₅₈₅) and the concentration of Fe³⁺ in the range of 0.75-125 μM. However, when AA was added to the AuNCs-Fe³⁺ system, the value of F ₄₂₅/F

SUBMITTER: Zhang S 

PROVIDER: S-EPMC9032689 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature