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A Comparison Of Physical And Electrochemical Properties Of Two Ionic Liquids Containing Different Cations: 1-Butyl-1-Methyl-Pyrrolidinium Beti And 1-Butyl-3-Methyl-Imidazolium Beti

Kennedy, Edward Nelson

Abstract Details

2009, Master of Science (MS), Wright State University, Chemistry.

A novel ionic liquid, 1,1-butyl-methyl-pyrollidinium bis-pentafluoroehthanesulfonylamide (BMPyrrBeti) was synthesized and characterized. Its physical and electrochemical properties compared to a similar ionic liquid containing the imidazolium cation, 1-methyl-3-butyl-imidizolium bis-pentafluoroehthanesulfonylamide (BMImBeti). The two ionic liquids contain the same anion, bis((pentafluoroethane)sulfonyl)imide (Beti), and the same two alkly group substituents (a methyl and a butyl group). The two ionic liquids differ only by the cation component, and the connectivity of the two substituents (1,1 for the former, and 1,3 for the latter).

The following physical properties of BMPyrrBeti were measured and compared to the same properties of BMImBeti: conductivity, viscosity, absorption and desorption of water, and thermal properties (TGA and DSC). The electrochemical properties of BMPyrrBeti were also measured. It was found that BMPyBeti was less conductive than BMImBeti, however this was mostly at higher temperatures. Viscosity measurements revealed that BMPyrrBeti was more viscous as BMImBeti, which often correlates inversely with conductivity, as in this case. Thermal decomposition by TGA occurred at an average temperature of 432 °C verses 410 °C for BMImBeti, or 105% percent higher. The freezing point of BMImBeti could not be determined by DSC. The freezing point of BMPyBeti was -38 °C. The electrochemical window of the new ionic liquid BMPyBeti was very wide, reaching a maximum of 6.5V. This was 144% percent wider than BMImBeti (4.5V). The diffusion coefficient of BMPyrrBeti was determined to at 25.4 °C and 50 °C from cyclic voltammetry of Ferrocene in NBu4PF6.

Vladimir Katovic, Ph.D. (Advisor)
Daniel Bombick, Ph.D. (Committee Member)
Suzanne Lunsford, Ph.D. (Committee Member)
Kenneth Turnbull, Ph.D. (Other)
Joseph F. Thomas Jr., Ph.D. (Other)
96 p.

Recommended Citations

Citations

  • Kennedy, E. N. (2009). A Comparison Of Physical And Electrochemical Properties Of Two Ionic Liquids Containing Different Cations: 1-Butyl-1-Methyl-Pyrrolidinium Beti And 1-Butyl-3-Methyl-Imidazolium Beti [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1253294969

    APA Style (7th edition)

  • Kennedy, Edward. A Comparison Of Physical And Electrochemical Properties Of Two Ionic Liquids Containing Different Cations: 1-Butyl-1-Methyl-Pyrrolidinium Beti And 1-Butyl-3-Methyl-Imidazolium Beti. 2009. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1253294969.

    MLA Style (8th edition)

  • Kennedy, Edward. "A Comparison Of Physical And Electrochemical Properties Of Two Ionic Liquids Containing Different Cations: 1-Butyl-1-Methyl-Pyrrolidinium Beti And 1-Butyl-3-Methyl-Imidazolium Beti." Master's thesis, Wright State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1253294969

    Chicago Manual of Style (17th edition)