Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (1): 54-60.DOI: 10.11944/j.issn.1000-0518.2020.01.190131

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Synthesis of Silver Nanoclusters Stabilized by pH-Regulated Chromotropic Acid 2R

GUO Yongyanab,ZENG Weiweia,YANG Pinga,TIAN Yanfeia,LONG Yunfeib*()   

  1. aHunan Nonferrous Metals Vocational and Technical College,Zhuzhou,Hu'nan 412006,China
    bSchool of Chemistry and Chemical Engineering,Hunan University ofScience and Technology,Xiangtan,Hu'nan 411201,China
  • Received:2019-05-07 Accepted:2019-08-28 Published:2020-01-08 Online:2020-01-08
  • Contact: LONG Yunfei
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21275047), Hunan Natural Science Foundation(No.2016JJ5005), Transformation and Development Project of Hunan Province Non-ferrous Metals Administration in 2018: Research on New Green Mineral Processing Technology of Yaogang Xian Tungsten Molybdenum Bismuth Polymetallic Ore


Silver nanoclusters have special physical and chemical properties and wide potential applications. In this paper, a method of rapid preparation of stable silver nanoclusters with strong fluorescence characteristics and small particle size was developed by using chromotropic acid 2R as the stabilizer and pH regulation twice. Under the optimal experimental conditions, the maximum emission wavelength of silver nanoclusters prepared is 450 nm, the maximum excitation wavelength is 336 nm, and the average particle size is 1.74 nm. The main particles are distributed in the region of 0.682.99 nm, the lattice spacing of the silver nanocluster is 0.223 nm, and the lattice type is (102). The silver nanoclusters can be used as probes for the determination of trace heavy metal ions, non-metallic ions in solutions and small molecules, the detection of weak acid concentration, and cell imaging.

Key words: pH regulation, chromotropic acid 2R stablizer, silver nanoclusters