基于 3-氨基苯硼酸功能化 CdTe 量子点探针的荧光比率法测定铜（II）
Fluorometric determination of copper(II) by using 3-aminophenylboronic acid-functionalized CdTe quantum dot probes.
机构信息
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules&College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, People's Republic of China.
出版信息
Mikrochim Acta. 2019 May 31;186(6):392. doi: 10.1007/s00604-019-3515-5.
Water-soluble cadmium telluride quantum dots capped with 3-mercaptopropionic acid were synthesized and further modified with 3-aminophenylboronic acid to form boronic acid-functionalized quantum dots (QDs). Under excitation at 350 nm, the modified QDs display yellow fluorescence with a peak at 566 nm. On exposure to copper(II), the fluorescence of the QDs is quenched. Under optimal conditions, fluorescence drops linearly in the 0.01 to 20 μM Cu(II) concentration range, and the detection limit is 7.6 nM. This fluorescent probe was applied to the determination of Cu(II) in spiked human serum and water samples and gave satisfactory results. Graphical abstract Schematic presentation of the principle for fluorometrice detection of copper(II) based on the use of boronic acid-functionalized cadmium telluride quantum dots (CdTe QDs).
巯基丙酸稳定的水溶性碲化镉量子点经 3-氨苯基硼酸进一步修饰，形成硼酸功能化量子点（QDs）。在 350nm 激发下，修饰后的 QDs 发射出峰值位于 566nm 的黄色荧光。当暴露于铜（II）时，QDs 的荧光被猝灭。在最佳条件下，荧光在 0.01 到 20μM 的 Cu(II)浓度范围内呈线性下降，检测限为 7.6nM。该荧光探针用于测定加标人血清和水样中的 Cu(II)，结果令人满意。
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