Study of the interaction of flavonoids with 3-mercaptopropionic acid modified CdTe quantum dots mediated by cetyltrimethyl ammonium bromide in aqueous medium

Aucélio, Ricardo Q.; Carvalho, José Murilo de; Real, Juliana T.; Maqueira-Espinosa, Luis; Pérez‐Gramatges, Aurora; Silva, Andrea R. da

doi:10.1016/j.saa.2016.04.021

Cited by 3 publications

(1 citation statement)

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“…One group of the polyphenolic compounds with antiviral, antihepatotoxic, therapeutic, and antibacterial properties that can be considered in human diets is flavonoids. [5][6][7][8] To evaluate the efficacy of significant flavonoids in the human food and its usefulness as a biomarker in vegetable and fruit groups, it is necessary to control the concentration of flavonoids in the diet along with human biological samples. It is well known that the nature of polyphenols and source of the food, the dose, and time significantly affect the concentration of these compounds in plasma.…”

Section: Introductionmentioning

confidence: 99%

A sensitive fluorescent probe based on dithizone‐capped ZnS quantum dots for quercetin determination in biological samples

Sadeghi

Hosseinpour-Zaryabi

2020

Luminescence

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A simple turn on/off fluorescence approach based on dithizone‐capped ZnS quantum dots (ZnS@DZ QDs) with the help of lead ions as a fluorescent probe for the quantitative determination of quercetin is reported. The interaction of lead ions with dithizone led to the formation of a rigid structure on the surface of ZnS@DZ QDs and turned on the fluorescence intensity of the QDs. After addition of quercetin to this probe and interaction with lead ions, the fluorescence emission turned off. Concerning the quenching fluorescence intensity of ZnS@DZ QDs/Pb2+ QDs probe induced by the target, under the optimum conditions, the probe enabled detection of quercetin in the concentration range from 0.54 μM to 21.7 μM with a correlation coefficient of 0.993 and detection limit of 0.25 μM. The present probe was applied successfully to the determine quercetin as a nutritional biomarker in human serum and 24‐h urine samples.

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Section: Introductionmentioning

confidence: 99%