Lysozyme-stabilized gold nanoclusters as a novel fluorescence probe for cyanide recognition.
Lysozyme-stabilized gold nanoclusters (Lys-AuNCs) have been synthesized and utilized as a fluorescent probe for selective detection of cyanide (CN(-)). Lys-AuNCs had an average size of 4 nm and showed a red emission at 650 nm (λex=370 nm). The fluorescence of Lys-AuNCs could be quenched by CN(-). An excellent sensitivity and selectivity toward the detection of CN(-) in aqueous solution was observed. The fluorescence intensity was linear with the CN(-) concentration in the range of 5.00×10(-6)M-1.20×10(-4) M with a detection limit as low as 1.9×10(-7) M. Also, the addition of CN(-) to Lys-AuNCs could induce an obvious color change from light yellow to colorless. Correspondingly, a bright red fluorescence disappeared and a blue fluorescence appeared. The results indicated that Lys-AuNCs could be applied in detection of cyanide on environmental aspects.
Research Center for Environmental Science and Engineering, Shanxi University, Taiyuan 030006, China.
Dongtao
D
Lu
College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
Lili
L
Liu
College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
Fengxia
F
Li
College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
Shaomin
S
Shuang
Research Center for Environmental Science and Engineering, Shanxi University, Taiyuan 030006, China.
Yingfu
Y
Li
Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong Special Administrative Region.
Matin M F
MM
Choi
Research Center for Environmental Science and Engineering, Shanxi University, Taiyuan 030006, China. Electronic address: dc@sxu.edu.cn.
Chuan
C
Dong
D000042:Absorption; D003486:Cyanides / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D009113:Muramidase / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D013050:Spectrometry, Fluorescence; D017550:Spectroscopy, Fourier Transform Infrared
D003486:Cyanides; D005456:Fluorescent Dyes; D006046:Gold; D009113:Muramidase
Cyanide recognition; Fluorescence probe; Gold nanoclusters