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China Surfactant Detergent & Cosmetics ›› 2021, Vol. 51 ›› Issue (12): 1163-1170.doi: 10.3969/j.issn.1001-1803.2021.12.001

• Basic research •     Next Articles

Detection of dodecyltrimethylammonium bromide based on aggregation-induced emission phenomenon

Sun Qing1,Fang Yinjun2,Liu Xuefeng1,*()   

  1. 1. Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
    2. Zanyu Technology Group Co., Ltd., Hangzhou, Zhejiang 310030, China
  • Received:2021-02-09 Revised:2021-11-15 Online:2021-12-22 Published:2021-12-21
  • Contact: Xuefeng Liu E-mail:xfliu@jiangnan.edu.cn

Abstract:

Cationic surfactants have obvious toxicity to microorganisms in soil and water. Methods for fast and sensitive analysis and detection of cationic surfactants are important tools for monitoring the discharge of cationic surfactants. Aggregation-induced emission (AIE) phenomenon analysis is an emerging and fast method to detect surfactants. However, the analysis of cationic surfactants based on AIE phenomenon has not been reported. Therefore, a “turn-on” fluorescence method for detecting dodecyltrimethylammonium bromide (DTAB) in water was established by using a water-soluble AIE probe, 1, 1, 2, 2-tetrakis[4-(3-sulfonatopropoxyl)phenyl] ethylene salt (TSTPE), and using DTAB as the model. The results showed that free TSTPE was only weakly emissive in water; after binding with DTAB by electrostatic interaction, its fluorescence emission intensity (F) was significantly enhanced and was further increased with the increase of DTAB concentration (c). When the concentration of TSTPE was 4.5×10 -5 mol/L, the linear response range of F vs. c was around 1.05×10 -4~1.7×10-4 mol/L, and the detection limit was approximately 5.7×10-7mol/L. The fluorescence emission of TSTPE-DTAB mixed system had good stability in the pH range of 3~10; three inorganic salts, NaCl, KCl and NaNO3, had little interference with the fluorescence emission of the TSTPE-DTAB mixture, and the recovery rate of DTAB in simulated water samples was not less than 95%.

Key words: fluorescent probe, aggregation-induced emission, detection, cationic surfactant

CLC Number: 

  • TQ423