【作者】 李杏娟； 韩彩玲； 凌剑； 曹秋娥； 丁中涛；

【Author】 Xing-Juan Li;Cai-Ling Han;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】 选择合适的模板分子、设计合理有效的方法来快速制备光学性质优良的贵金属纳米簇是目前荧光材料的研究热点。光致还原法是一种低成本、无毒、耗时较少且绿色环保的制备贵金属纳米簇的方法。本文主要以组氨酸为模板,利用光催化法快速合成水溶性的组氨酸金纳米簇。相比于以往合成金纳米簇的方法[1],该方法可以明显提高金纳米簇的合成速度,反应时间缩短到半小时,实现了快速、简单、绿色环保的合成。同时,研究还发现,银离子能选择性的猝灭所合成的组氨酸金簇的荧光,并且荧光猝灭程度与银离子浓度的增加呈良好的线性关系。基于此现象,我们建立了一种以组氨酸金纳米簇作为荧光探针选择性检测银离子的的方法。更多还原

【Abstract】 Designing a reasonable and effective way for preparation of noble metal nanoclusters with excellent optical properties is still a hot research interest. Photoreduction method is a low-cost, non-toxic, less time-consuming and green method for preparing noble metal nanoclusters. In this work, we synthesized water-soluble histidine-capped fluorescence gold nanoclusters by a rapid photoreduction method. Compared to previous methods, the synthesis time of the method can be shortened to half an hour. Meanwhile, we found that the fluorescence intensity of the gold clusters can be quenched by Ag+ selectively and the quenching ratio has good relationship with the increasing of adding Ag+. Based on this phenomenon, we established an analytical method for selective detection of Ag+ by histidine-capped gold nanocluster probe.更多还原