期刊
ANALYTICAL CHEMISTRY
卷 86, 期 6, 页码 3188-3194出版社
AMER CHEMICAL SOC
DOI: 10.1021/ac500122v
关键词
-
资金
- IISER Bhopal
- DST-Fast track scheme [SR/FT/CS-19/2011]
- CSIR
- UGC, Government of India
In this work, we report the application of protein-templated Ag nanoclusters as a luminescent photoswitch for the detection of metal ions. Ag nanoclusters were synthesized using the circulatory protein human serum albumin (HSA) as a template, whose synthetic procedure can be tuned to make them toggle between blue-emitting (Ag-9:HSA) and red-emitting (Ag-9:HSA) nanoclusters. The photoluminescence (PL) intensity of Ag-9:HSA was quenched significantly in the presence of 1 mM Co(II) ions. However, the PL of these quenched nanoclusters was completely restored in the presence of 3 mM Zn(II) ions. This enables them to be used as dual sensors and can serve as luminescent turn on and off' metal switches. In contrast, the Ag-14:HSA did not exhibit any photoswitchable properties but was able to detect Hg(II) selectively and to a high detection limit (10 nM). The luminescent-based sensing properties of these Ag:NCs were further supported by our time-resolved studies. The present study exhibits a promising step toward the application of luminescent metal nanoclusters as potential metal sensors since by tuning their luminescent properties we were able to detect and quantify metal ions selectively and simultaneously switch their sensing behaviors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据