首页> 外文期刊>International journal of biomedical nanoscience and nanotechnology >Determination of zinc in aqueous solution using CdSe/ZnS quantum dots functionalised with [carboxymethyl-(4-mercapto-phenyl)-amino]-acetate
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Determination of zinc in aqueous solution using CdSe/ZnS quantum dots functionalised with [carboxymethyl-(4-mercapto-phenyl)-amino]-acetate

机译:使用[羧甲基-(4-巯基苯基)-氨基]乙酸酯官能化的CdSe / ZnS量子点测定水溶液中的锌

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摘要

CdSe/ZnS quantum dots functionalised with [Carboxymethyl-(4-mercapto-phenyl)-amino]-acetate displayed selectivity for Zn~(2+) ion when tested against a range of other commonly available metal ions in buffered aqueous solution (pH 7.0 ± 0.1). The probe displayed an enhancement in its fluorescence intensity upon addition of Zn~(2+) attributed to a cancellation of a photoinduced electron transfer process from the bound receptor to the excited quantum dot that otherwise led to non-radiative decay. Good linearity was established for Zn~(2+) in the 0.2 to 5.0 mM range.
机译:当在缓冲水溶液(pH 7.0)中针对一系列其他常见金属离子进行测试时,用[羧甲基-(4-巯基苯基)-氨基]-乙酸酯官能化的CdSe / ZnS量子点显示对Zn〜(2+)离子的选择性±0.1)。探针在添加Zn〜(2+)后显示出荧光强度的增强,这归因于从结合的受体到受激量子点的光致电子转移过程的取消,否则将导致非辐射衰变。 Zn〜(2+)在0.2至5.0 mM范围内建立了良好的线性。

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