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首页> 外文期刊>RSC Advances >Self-assembly of phosphorescent quantum dots/boronic-acid-substituted viologen nanohybrids based on photoinduced electron transfer for glucose detection in aqueous solution
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Self-assembly of phosphorescent quantum dots/boronic-acid-substituted viologen nanohybrids based on photoinduced electron transfer for glucose detection in aqueous solution

机译：磷光量子点/硼酸酸取代的Viologen纳米胺的自组装基于光致电子转移在水溶液中的葡萄糖检测

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摘要

We synthesized boronic-acid-substituted viologens (BBV) and designed a glucose sensor based on room-temperature phosphorescence (RTP) quantum dots (QDs) and BBV. This sensor utilizes 3-mercaptopropionic acid (MPA)-capped Mn-doped ZnS QDs as an RTP indicator as well as BBV as an RTP quencher and a glucose detection receptor. At physiological pH 7.4, the negatively-charged MPA-capped Mn-doped ZnS QDs and the positively-charged BBV interact via electrostatic attraction to form composites, which quench the RTP of MPA-capped Mn-doped ZnS QDs via photoinduced electron transfer (PIET). After addition of glucose into this two-component system, it binds with boric acid to form a tetrahedral anionic borate, which effectively neutralizes the positive charge of BBV and deprives BBV from the QDs, thereby restoring the RTP. On this basis, this new sensor is built for glucose detection. This sensor has a detection limit of 0.09 mM and two linear ranges from 0 to 4 mM and from 4 to 16 mM, respectively. This sensor features enzyme independence, simple design and easy operation.
机译：我们合成硼酸酸取代的Viologens（BBV），并设计基于室温磷光（RTP）量子点（QDS）和BBV的葡萄糖传感器。该传感器利用3-巯基丙酸（MPA） - 掺杂的MN掺杂的ZnS QDS作为RTP指示器以及BBV作为RTP猝灭剂和葡萄糖检测受体。在生理学pH 7.4中，通过静电吸引物与带有静电吸引物相互作用以形成复合材料的带负电的MPa-掺杂的ZnS和带正电荷的BBV，该复合材料通过光致电子转移淬灭MPa-Lape Mn-Doped ZnS QDS的RTP ）。在将葡萄糖加入该双组分系统之后，它与硼酸结合形成四面体阴离子硼酸盐，这有效地中和BBV的正电荷并剥夺了QDS的BBV，从而恢复了RTP。在此基础上，该新传感器是为葡萄糖检测而构建的。该传感器的检出限为0.09mm，两个线性范围为0至4 mm，分别为4至16mm。该传感器具有酶独立性，设计简单，操作简便。

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