Determining the Coordination Number of Li+ and Glyme or Poly(ethylene glycol) in Solution Using Attenuated Total Reflectance-Far Ultraviolet Spectroscopy

Nami Ueno; Tomonari Wakabayashi; Yusuke Morisawa

doi:10.2116/analsci.19C011

Determining the Coordination Number of Li⁺ and Glyme or Poly(ethylene glycol) in Solution Using Attenuated Total Reflectance-Far Ultraviolet Spectroscopy

Anal Sci. 2020 Jan 10;36(1):91-93. doi: 10.2116/analsci.19C011. Epub 2019 Dec 20.

Authors

Nami Ueno¹, Tomonari Wakabayashi², Yusuke Morisawa³

Affiliations

¹ Major in Science, Graduate School of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashi-osaka, Osaka, 577-8502, Japan.
² Department of Science, Faculty of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashi-osaka, Osaka, 577-8502, Japan.
³ Department of Science, Faculty of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashi-osaka, Osaka, 577-8502, Japan. morisawa@chem.kindai.ac.jp.

PMID: 31866602
DOI: 10.2116/analsci.19C011

Abstract

Attenuated total reflectance-far ultraviolet (ATR-FUV) spectra of Li⁺ and polyether ligands, such as glymes and poly (ethylene glycol) (PEG), in solution give information about changes in the electronic states of the ligands. From the ATR-FUV spectra, the coordination numbers between Li⁺ and monoglyme, diglyme, triglyme, and PEG400 were determined to be 4, 5, 6, and 5, respectively. Our results indicate that Li⁺ is coordinated only by the ligands rather than its counter-ions.

Keywords: ATR-FUV; alkali metal complexes; coordination number; electrolyte; electronic states.