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首页> 外文期刊>RSC Advances >Mn-doped ZnS quantum dots with a 3-mercaptopropionic acid assembly as a ratiometric fluorescence probe for the determination of curcumin
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Mn-doped ZnS quantum dots with a 3-mercaptopropionic acid assembly as a ratiometric fluorescence probe for the determination of curcumin

机译：锰掺杂的ZnS量子点，带有3-巯基丙酸组件作为比率荧光探针，用于测定姜黄素

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摘要

Mn-doped ZnS quantum dots capped with 3-mercaptopropionic acid (MPA) were synthesized by a facile method in aqueous solution as a ratiometric fluorescent (I-590 nm/I-458 nm) probe for curcumin. Curcumin caused defect-related fluorescence quenching of the probe at 458 nm, whereas the orange transition emission of the probe at 590 nm changed only negligibly with variations in curcumin concentration. The MPA-assembled Mn-doped ZnS quantum dots were used for the simple, sensitive and non-toxic determination of curcumin. Under the optimized conditions, the response to curcumin was linear in the range 0.16-16.9 mu M with a detection limit of 37 nM. The method was successfully applied to the determination of trace amounts of curcumin in urine samples with recoveries of 97.73-109.73%.
机译：通过简便的方法在水溶液中合成了由3-巯基丙酸（MPA）包覆的Mn掺杂的ZnS量子点，作为姜黄素的比例荧光（I-590 nm / I-458 nm）探针。姜黄素引起与缺陷相关的探针在458 nm处的荧光猝灭，而探针在590 nm处的橙色转变发射随姜黄素浓度的变化仅可忽略不计。 MPA组装的Mn掺杂ZnS量子点用于姜黄素的简单，灵敏和无毒测定。在最佳条件下，对姜黄素的响应在0.16-16.9μM范围内呈线性，检测限为37 nM。该方法成功用于尿样中痕量姜黄素的测定，回收率为97.73-109.73％。

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