Chem. J. Chinese Universities ›› 2015, Vol. 36 ›› Issue (10): 1906.doi: 10.7503/cjcu20150242

• Analytical Chemistry • Previous Articles     Next Articles

Spectral Performance and Fluorescence Detection of Ionic Liquid [MBPy]Tf2N

OUYANG Qiaofeng1,2, ZHENG Lanlan1,4, CAO Hong2,*(), ZHANG Xin1, LI Chun3, SHEN Jiao2, CHEN Liting2, LIU Jin2   

  1. 1. School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, China
    2. College of Biological and Chemical Engineering, Jiaxing University, Jiaxing 314001, China
    3. School of Life Science, Beijing Institute of Technology, Beijing 100081, China
    4. Kashgar University, Kashi 844006, China
  • Received:2015-03-26 Online:2015-10-10 Published:2015-09-14
  • Contact: CAO Hong E-mail:chyf_ch@126.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21146012, 21266029), the Science and Technology Foundation of Ministry of Education, China(No.209146) and the Doctoral Foundation Project of Xinjiang Production and Construction Corps of China(No.2009JC13)

Abstract:

The detection method of hydrophobic ionic liquid N-methyl-N-butyl pyrrolidinium bis[(trifluoro-methyl)sulfonyl]imide([MBPy]Tf2N) was established by means of fluorescence spectrum and applied for the analysis of [MBPy]Tf2N from glycyrrhizin biological catalysis system containing ionic liquid. The effects of solvent, ethanol-water mixture solvent and pH on fluorescence spectrum were explored. Spectral features of [MBPy]Tf2N, the maximum absorption wavelength at 186 nm, were apparently cannot detect [MBPy]Tf2N by common UV method. The maximum excitation wavelength of [MBPy]Tf2N is at 228 nm and the maximum emission wavelength of it is at 340 nm, which can well againsted photobleaching and the fluorescence quantum yield was 0.067 in water. The fluorescence intensity increased in ethanol-water mixture solvent and changed much in alkaline medium. The fluorescence detection method for [MBPy]Tf2N had a wide linear range over [MBPy]Tf2N concentration from 5.00 to 1.25×103 μg/mL with a detection limit of 1.00 μg/mL(S/N=3). The spiked recoveries were from 97.4% to 107.4%(RSD=4.6%) in glycyrrhizin biological catalysis system.

Key words: Hydrophobic ionic liquid, N-Methyl-N-butyl pyrrolidinium bis[(trifluoromethyl)sulfonyl]imide([MBPy]Tf2N), Spectral characterization, Fluorescence detection method, Biological catalysis system

CLC Number: 

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