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CdS-Eu(Ⅲ)体系荧光恢复的磷酸根离子可视化测定

DOI: 10.11830/ISSN.1000-5013.2014.04.0413, PP. 413-418

Keywords: CdS量子点,Eu+,荧光恢复,磷酸根离子

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Abstract:

以聚丙烯酸(PAA)为稳定剂,成功合成了水溶性的CdS量子点(QDs).CdSQDs表面的羧基能与Eu3+结合导致QDs聚集,有效引发QDs间能量的转移,致使CdSQDs荧光显著猝灭.当加入PO3-4时,由于PO3-4与Eu3+的结合能力强于CdSQDs表面的羧基,CdSQDs荧光强度又逐渐恢复.由此建立一种基于CdS-Eu(Ⅲ)体系荧光恢复可视化测定磷酸根离子的新方法.该方法灵敏、简单,检测限为0.078μmol?L-1.

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