Abstract: A highly stable fluorescent Ag nanoclusters (DMF/AgNCs) is prepared simply through reflux method with N,N-dimethylformamide (DMF) as reducer and stabilizer,and the quantum yield is 23.5%.The prepared DMF/AgNCs samples are characterized by HRTEM and fluorescence spectroscopy.The results indicate that small size AgNCs emits strong blue fluorescence possessing excellent water-solubility and photostability.After the addition of picric acid (PA),the charge transfer happens between the benzene ring of PA and DMF/AgNCs,which enables the fluorescence of DMF/AgNCs be efficiently quenched by PA.Therefore,a new,simple method for rapid and sensitive detection of PA is established.Under the optimized experimental conditions,this method shows a good linear relationship within the concentration range of 3.3×10-9-4.5×10-8 mol·L-1,the detection limit is 1.0×10-9 mol·L-1 and the correlation coefficient R2=0.993 8.This method has good selectivity for the detection of PA,which can be used for the detection of PA in environmental water samples.
戴兴露, 代蕊, 邓文清, 胡平越, 黄科, 熊小莉. DMF/AgNCs荧光探针检测苦味酸[J]. 现代化工, 2018, 38(11): 243-247.
DAI Xing-lu, DAI Rui, DENG Wen-qing, HU Ping-yue, HUANG Ke, XIONG Xiao-li. DMF/Ag nanoclusters fluorescent probe for detection of picric acid. Modern Chemical Industry, 2018, 38(11): 243-247.
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