X-RAY PHOTOELECTRON SPECTROSCOPY OF IMIDAZOLIUM ZWITTERIONIC SALTS: COMPARISON TO ACETATE ANALOGS AND THE IMPACT OF THE ALKYL CHAIN LENGTH ON THE CHARGE DISTRIBUTION
Abstract
We investigate two imidazolium zwitterionic salts, 1,3-dimethylimidazolium-2-carboxylate and 1-butyl-3-methylimidazolium-2-carboxylate, together with 1-butyl-3-methylimidazolium acetate using X-ray photoelectron spectroscopy. The electronic environment of each element for the two zwitterionic salts is analyzed. Due to the electron-withdrawing effect of the imidazolium cation, the binding energies of Ccarboxyl 1s and O 1s for zwitterionic salts are higher than those of 1-butyl-3-methylimidazolium acetate. The impact of the alkyl chain length on the charge distribution is also illustrated. It suggests that the electron-withdrawing effect of the imidazolium cation decreases along with the increasing of the alkyl chain length.
About the Authors
Sh. . Men
School of Material Science and Engineering, Shenyang Ligong University; Institute of Applied Ecology, Chinese Academy of Sciences
Russian Federation
Russian Federation
J. . Jiang
School of Mechanical Engineering and Automation, Northeastern University
Russian Federation
Russian Federation
Y. . Liu
School of Material Science and Engineering, Shenyang Ligong University
Russian Federation
Russian Federation
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Review
For citations:
Men Sh., Jiang J., Liu Y. X-RAY PHOTOELECTRON SPECTROSCOPY OF IMIDAZOLIUM ZWITTERIONIC SALTS: COMPARISON TO ACETATE ANALOGS AND THE IMPACT OF THE ALKYL CHAIN LENGTH ON THE CHARGE DISTRIBUTION. Zhurnal Prikladnoii Spektroskopii. 2017;84(5):836(1)836(5). (In Russ.)
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