【作者】 韩彩玲； 张玲艳； 李杏娟； 凌剑； 曹秋娥； 丁中涛；

【Author】 Cai-Ling Han;Ling-Yan Zhang;Xing-Juan Li;Jian Ling;Qiu-E Cao;Zhong-Tao Ding;School of Chemical Science and Technology,Yunnan University;

【机构】 云南大学化学科学与工程学院；

【摘要】 利用金属离子诱导的聚集诱导发光(AIE)现象可用于金属离子的检测,但是这种聚集诱导发光选择性较差,很难排除其他金属离子的影响[1]。我们在研究谷胱甘肽包被的金纳米簇的聚集诱导发光现象时发现,普通制备的谷胱甘肽金纳米簇加入金属离子后,有明显的聚集诱导发光现象,但荧光增强程度较小,且选择性不好(如图1A所示)。然而,将这种金纳米簇于半胱氨酸作用,制备得到无荧光的谷胱甘肽-金-半胱氨酸复合物后,这种复合物在镉离子存在下有非常优越的聚集诱导发光现象,荧光增强50倍。此外,镉离子的聚集诱导发光有较好的选择性(如图1B所示)。基于此现象,我们建立了镉离子的选择性荧光增强检测方法。更多还原

【Abstract】 Although metal ions induced aggregation induced emission(AIE) method can be used to detect the heavy metal ions, the selectivity of AIE by metal ions is bad. We found that although glutathione(GSH) stabilized gold nanoclusters could be aggregated by metal ions, the enhancement is not specific for one metal ions and the ratio of fluorescence enhancement is also low. However, if cysteine(Cys) was added to GSH stabilized gold nanoclusters, the as-prepared GSH-Au-Cys complex has excellent AIE property. The fluorescence of the complex enhanced 50 times after an AIE process by cadmium ions, and the most importance thing is that, the AIE of the complex can only be induced by cadmium ions. Based on this phenomenon, we have established a method for the selective detection of cadmium ions using selective AIE of GSH-gold nanoclusters.更多还原