华侨大学学报（自然科学版）
華僑大學學報（自然科學版）
화교대학학보（자연과학판）
JOURNAL OF HUAQIAO UNIVERSITY(NATURAL SCIENCE)
2014年
4期
413-418
,共6页
CdS量子点%Eu3+%荧光恢复%磷酸根离子
CdS量子點%Eu3+%熒光恢複%燐痠根離子
CdS양자점%Eu3+%형광회복%린산근리자
CdS quantum dots%Eu3+%fluorescence recovery%phosphate anion
以聚丙烯酸（PAA）为稳定剂，成功合成了水溶性的 CdS量子点（QDs）．CdS QDs 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 CdS QDs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CdS QDs表面的羧基，CdS QDs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．
以聚丙烯痠（PAA）為穩定劑，成功閤成瞭水溶性的 CdS量子點（QDs）．CdS QDs 錶麵的羧基能與Eu3＋結閤導緻 QDs聚集，有效引髮 QDs間能量的轉移，緻使 CdS QDs熒光顯著猝滅．噹加入 PO3-4時，由于PO3-4與Eu3＋的結閤能力彊于CdS QDs錶麵的羧基，CdS QDs熒光彊度又逐漸恢複．由此建立一種基于CdS？ Eu（Ⅲ）體繫熒光恢複可視化測定燐痠根離子的新方法．該方法靈敏、簡單，檢測限為0．078μmol·L-1．
이취병희산（PAA）위은정제，성공합성료수용성적 CdS양자점（QDs）．CdS QDs 표면적최기능여Eu3＋결합도치 QDs취집，유효인발 QDs간능량적전이，치사 CdS QDs형광현저졸멸．당가입 PO3-4시，유우PO3-4여Eu3＋적결합능력강우CdS QDs표면적최기，CdS QDs형광강도우축점회복．유차건립일충기우CdS？ Eu（Ⅲ）체계형광회복가시화측정린산근리자적신방법．해방법령민、간단，검측한위0．078μmol·L-1．
In this study,the water-soluble CdS quantum dots (QDs)stabilized by polyacrylic acid (PAA)were success-fully synthesized.Eu3+ ions could efficiently induce clustering of QDs through the carboxylic acid groups on surface of CdS QDs,which resulted in apparent fluorescence quenching due to energy transfer between CdS QDs.Because the chela-tion ability between Eu3+ and PO3-4 was stronger than that between Eu3+ and carboxyl groups,the fluorescence intensity of CdS QD gradually recovered when PO3-4 were introduced to the CdS-Eu(Ⅲ)system.Thus a novel fluorescence recov-ery and visual method for the determination of PO3-4 has been developed based on CdS-Eu(Ⅲ)system.The present novel assay with a detection limit (3σ)of 0.078μmol·L-1 is very simple and sensitive.
