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MPA稳定的CdTe量子点合成及Cu2+检测应用

江波, 黄麒, 卢强, 李曹龙, 王飞, 仁青加, 仁增

江波, 黄麒, 卢强, 李曹龙, 王飞, 仁青加, 仁增. MPA稳定的CdTe量子点合成及Cu2+检测应用[J]. 中国药科大学学报, 2017, 48(3): 311-316. DOI: 10.11665/j.issn.1000-5048.20170310
引用本文: 江波, 黄麒, 卢强, 李曹龙, 王飞, 仁青加, 仁增. MPA稳定的CdTe量子点合成及Cu2+检测应用[J]. 中国药科大学学报, 2017, 48(3): 311-316. DOI: 10.11665/j.issn.1000-5048.20170310
JIANG Bo, HUANG Qi, LU Qiang, LI Caolong, WANG Fei, REN Qingjia, REN Zeng. Synthesis of 3-mercaptopropionic acid-stabilized CdTe quantum dots and its application for the detection of Cu2+[J]. Journal of China Pharmaceutical University, 2017, 48(3): 311-316. DOI: 10.11665/j.issn.1000-5048.20170310
Citation: JIANG Bo, HUANG Qi, LU Qiang, LI Caolong, WANG Fei, REN Qingjia, REN Zeng. Synthesis of 3-mercaptopropionic acid-stabilized CdTe quantum dots and its application for the detection of Cu2+[J]. Journal of China Pharmaceutical University, 2017, 48(3): 311-316. DOI: 10.11665/j.issn.1000-5048.20170310

MPA稳定的CdTe量子点合成及Cu2+检测应用

基金项目: 国家自然科学基金资助项目(No.81660708);西藏自治区科技厅重点资助项目(No.2015XZ01G70)

Synthesis of 3-mercaptopropionic acid-stabilized CdTe quantum dots and its application for the detection of Cu2+

  • 摘要: 通过水相法制备3-巯基丙酸(MPA)稳定的碲化镉量子点(CdTe QDs),即MPA-CdTe QDs。研究Cu2+对发射波长为599 nm的MPA-CdTe QDs荧光猝灭效应,发现Cu2+浓度与荧光猝灭强度之间满足Stern-Volmer修正方程的线性关系。通过多项式拟合得出Cu2+浓度在2.28×10-6~18.24×10-6 mol/L和4.8×10-7~12×10-7mol/L两个区间范围内与MPA-CdTe QDs的荧光强度F0/F的多项式关系分别为:F0/F=7.999-2.470c+0.339c2F0/F=3.154-0.160 c+0.049 c2,拟合度分别为0.991,0.993。MPA-CdTe QDs对Cu2+检测限可达1.326×10-7 mol/L。
    Abstract: The water-soluble 3-mercaptopropionic acid(MPA)-stabilized CdTe(MPA-CdTe)quantum dots(QDs)were synthesized by aqueous suspension. The study showed that the fluorescence quenching process of Cu2+ to MPA-CdTe QDs, whose largest emission peak was 599 nm, could be described well by the theory of fluorescence quenching in competitive absorption systems and its modification of Stern-Volmer equations. By fittings, the results showed a good polynomial relationship between the fluorescence intensity F0/F and the concentration of Cu2+, when the concentration was in the range of 2. 28×10-6-18. 24×10-6 mol/L and 4. 8×10-7-12×10-7mol/L, and two polynomial equations were respectively elucidated based on dynamic and static quenching in competitive-absorption systems: F0/F=7. 999-2. 470c +0. 339 c2, F0/F=3. 154-0. 160 c+0. 049 c2 and degree of fitting are 0. 991 and 0. 993, respectively. The detection limit was 1. 326×10-7.
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出版历程
  • 刊出日期:  2017-06-24

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