金属离子对二巯基辛酸修饰CdSe/ZnS量子点荧光的无规则影响(英文)  

Ruleless Effect of Metal Ions on the Fluorescence of Dihydrolipoic Acid Capped CdSe/ZnS Quantum Dots

作　　者：郝建玉[1] 卢一卉[1] 周东波[1] 郑鹄志[1] 胡玉斐[1] 杜娟[1] 刘里[1] 

机构地区：[1]西南大学化学化工学院,重庆400715

出　　处：《西南大学学报（自然科学版）》2009年第5期26-29,共4页Journal of Southwest University(Natural Science Edition)

基　　金：国家重大科学研究计划资助项目(2006CB933103);国家自然科学基金资助项目(20707017);西南大学博士基金资助项目(SWNUB2005011)

摘　　要：以二巯基辛酸为修饰试剂制备了水溶性CdSe/ZnS量子点.报道了Pb2+,Cu2+,Cd2+和Ag+对DHLA-QDs荧光的无规则影响.初步探讨了金属离子对二巯基辛酸修饰的CdSe/ZnS量子点荧光强度无规则影响的机理,推测量子点能否用作金属离子探针与其表面修饰基团密切相关.Water-soluble dihydrolipoic acid capped CdSe/ZnS quantum dots （DHLA-QDs） were prepared by a slight modification of the procedure of precursors. DHLA-QDs are widely used in biological labeling for Water-soluble and biocompatible. Herein, we reported that Pb^2＋ , Cu^2＋ , Cd^2＋ and Ag^＋ had great effects on the fluorescence of the DHLA-QDs, but these effects were ruleless. It was speculated that the modified ligands on the surface of QDs played an important role in whether water-soluble QDs were suitable to detect metal ions as fluorescence probes. The possible reason was discussed.

关 键 词：量子点 金属离子 荧光探针 修饰基团 

分 类 号：O65[理学—分析化学]