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X-ray Photoelectron Spectroscopy of 1-Butyl-2,3-Dimethylimidazolium Ionic Liquids: Charge Correction Methods and Electronic Environment of the Anion

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Abstract

In this study, six 1-butyl-2,3-dimethylimidazolium ionic liquids are analyzed by X-ray photoelectron spectroscopy. A reliable fitting model is developed for the C 1s region. The charge correction method is discussed in detail. It suggests that the aliphatic carbon component can be used as an internal reference only if the Kamlet-Taft hydrogen bond acceptor ability value is larger than 0.57. The electronic environment of each anion-based component is compared to that of 1-butyl-3-methylimidazolium ionic liquids. It is found that noticeable binding energy shift can be observed in the spectra of S 2p for [TfO]– and P 2p for [PF6]–.

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ACKNOWLEDGMENTS

The authors thank Liaoning Provincial Foundation of Science and Technology (20180550482) for financial support.

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Authors and Affiliations

  1. School of Material Science and Engineering, Shenyang Ligong University, 110159, Shenyang, P. R. China

    Li Wei &  Shuang Men

  2. Ningbo Wintop Advanced Material Co. Ltd., 315311, Ningbo, P. R. China

    Li Wei

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  1. Li Wei
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  2. Shuang Men
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Correspondence to Shuang Men.

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Li Wei, Shuang Men X-ray Photoelectron Spectroscopy of 1-Butyl-2,3-Dimethylimidazolium Ionic Liquids: Charge Correction Methods and Electronic Environment of the Anion. Russ. J. Phys. Chem. 93, 2676–2680 (2019). https://doi.org/10.1134/S0036024419130326

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  • DOI: https://doi.org/10.1134/S0036024419130326

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