pH of N,N-Dimethylformamide in [Bmim][BF₄] and [Bmim][PF₆] Ionic Liquids

Abstract:

The pH value of binary mixtures containing N,N-dimethylformamide (DMF) and 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]) and 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) ionic liquids over the range of N,N-dimethylformamide mole fraction from (0.1 to 0.9) and temperature range from (293.15 to 338.15) K were measured. The range of pH values of N,N-dimethylformamide and [Bmim][BF4] and [Bmim][PF6] were from (3.42 to 6.50) and (6.98 to 9.74), respectively. Comparison showed that the pH of N,N-dimethylformamide in the two ionic liquids was in sequence: [Bmim][BF4] < [Bmim][PF6] at the same conditions. The temperature dependency of the pH value was correlated using an empirical equation. The correlations gave satisfactory results.

• Periodical: Advanced Materials Research (Volumes 393-395)
• Pages: 1322-1327
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.393-395.1322
• Online since: November 2011
• Authors: Bin Guo, Liang Gao, Er Hong Duan, Ai Ling Ren, Jian Zhong Chen
• Keywords: [Bmim][BF₄], [Bmim][BF₆], Ionic Liquid (IL), N, N-Dimethylformamide, pH

References

[1] S. Keskin, D. Kayrak-Talay, U. Akman et al.: J. Supercrit. Fluids Vol. 43 (2007), p.150–180.

[2] K.N. Marsh, J.A. Boxall and R. Lichtenthaler: Fluid Phase Equilib. Vol. 219 (2004), p.93–98.

[3] S. Pandey: Anal. Chim. Acta Vol. 556 (2006), p.38–45.

[4] J.S. Wilkes, J.A. Levisky, R.A. Wilson et al.: Inorg. Chem. Vol. 21 (1982), p.1263–1264.

[5] T.L. Tarbuck, G.L. Richmond: J. Am. Chem. Soc. Vol. 128 (2006), p.3256–3267.

[6] A. Yokozeki, M.B. Shiflett: Appl. Energ. Vol. 84 (2007), p.351–361.

[7] L. Crowhurst, N.L. Lancaster, J.M. Perez-Arlandis et al.: J. Am. Chem. Soc. Vol. 126 (2004), p.11549–11555.

[8] E.H. Duan, B. Guo, M.M. Zhang et al.: J. Chem. Eng. Data Vol. 55 (2010), p.3278–3281.

[9] X.L. Yuan, S.J. Zhang and X.M. Lu: J. Chem. Eng. Data Vol. 52 (2007), p.596–599.

[10] J.J. Wang, Y. Tian, Y. Zhao et al.: Green Chem. Vol. 5 (2003), p.618–622.

[11] A. Arce, E. Rodil and A. Soto: J. Solution Chem. Vol. 35 (2006), p.63–78.

[12] Y. Geng, S. Chen, T. Wang et al.: J. Mol. Liq. Vol. 143 (2008), p.100–108.

[13] J. Li, Y. Hu, S. Sun et al.: J. Chem. Thermodyn. Vol. 42 (2010), p.904–908.

[14] H. Gao, F. Qi, and H. Wang: J. Chem. Thermodyn. 41 (2009), p.888–892.

[15] H. Gao, Z. Yu and H. Wang: J. Chem. Thermodyn. Vol. 42 (2010), p.640–645.

[16] E. Bogel-Lukasik, U. Domanska: Green Chem. Vol. 6 (2004), p.299–303.

[17] B.H. Lim, W.H. Choe, J.J. Shim et al.: Korean J. Chem. Eng. Vol. 26 (2009), p.1130–1136.