Chemical Research in Chinese Universities ›› 2017, Vol. 33 ›› Issue (6): 929-933.doi: 10.1007/s40242-017-7170-2

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Physicochemical Properties of Bi-containing Ionic Liquid Analogs Based on Choline Chloride

BU Luxia, LIU Daying, WEI Zhen, MA Zhanlin   

  1. Department of Applied Chemistry, College of Basic Science, Tianjin Agricultural University, Tianjin 300384, P. R. China
  • Received:2017-05-09 Revised:2017-08-25 Online:2017-12-01 Published:2017-09-26
  • Contact: BU Luxia,E-mail:buluxia@126.com E-mail:buluxia@126.com
  • Supported by:
    Supported by the Natural Science Foundation of Tianjin City, China(No.15JCQNJC05900).

Abstract: The preparation and characterization of homogeneous and colorless ionic liquid analogs(ILAs) containing choline chloride(ChCl), malonic acid and bismuth chloride were investigated. The structure of the above mixture was preliminarily analyzed, and then the physicochemical properties including viscosity, conductivity and density were investigated as functions of temperature and composition. Additionally, the thermal stability of the ILAs and the electrochemical behavior of Bi3+ ions in the medium were studied. Structure analysis reveals that the synthesis of deep eutectic solvents(DESs) is closely related to the formation of hydrogen bonds between malonic acid and ChCl, with their viscosity, conductivity and density being greatly dependent on the temperature and composition. Thermogravimetric analysis demonstrates that the ILAs are very stable between room temperature and 398.15 K. And the electrochemical experiments indicate that the bismuth films can be successfully deposited from this ILAs and the deposition mechanism of bismuth is a rather irreversible process. The surface morphology of bismuth films deposited on Cu substrates was very compact and smooth. Thus, ChCl-malonic acid DESs were shown to be a good alternative to aqueous solvents for various deposition-related applications.

Key words: Ionic liquid analog, Physicochemical property, Bismuth, Choline chloride, Deposition