Structure and Charge Distribution in Anions of Bromodiiodide Ionic Liquids

Structure and Charge Distribution in Anions of Bromodiiodide Ionic Liquids

We investigate two typical trihalide ionic liquids, 1-octyl-3-methylimidazolium bromodiiodide ([C 8 C 1 Im][BrI 2 ]) and 1-octyl-3-butylimidazolium bromodiiodide ([C 8 C 4 Im][BrI 2 ]), using X-ray photoelectron spectroscopy. The electronic environment of each element within the [BrI 2 ] – anion is...

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Veröffentlicht in:Russian Journal of Physical Chemistry A 2023-06, Vol.97 (6), p.1190-1194
Hauptverfasser: Sun, Yusheng, Men, Shuang, Liu, Yanhui, Jin, Yujuan
Format: Artikel
Sprache:eng
Schlagworte:
Anions
Binding energy
Bromine
Charge distribution
Chemistry
Chemistry and Materials Science
Iodine
Ionic liquids
Photoelectrons
Physical Chemistry
Structure of Matter and Quantum Chemistry
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Zusammenfassung:We investigate two typical trihalide ionic liquids, 1-octyl-3-methylimidazolium bromodiiodide ([C 8 C 1 Im][BrI 2 ]) and 1-octyl-3-butylimidazolium bromodiiodide ([C 8 C 4 Im][BrI 2 ]), using X-ray photoelectron spectroscopy. The electronic environment of each element within the [BrI 2 ] – anion is analyzed in detail. The Br 3 d binding energy of [C 8 C 1 Im][BrI 2 ] is found higher than that of [C 8 C 1 Im]Br, due to the formation of the negative charge delocalized structure. The I 3 d spectrum indicates that there are two iodine components formed, showing binding energies at 620.8 and 619.6 eV, respectively. The structure of the [BrI 2 ] – anion is subsequently confirmed.
ISSN:0036-0244
1531-863X
DOI:10.1134/S003602442306033X