Vibrational Spectroscopic Identification of the [AlCl<sub>2</sub>]<sup>+</sup> Cation in Ether-Containing Liquid Electrolytes
A Raman and IR study of AlCl<sub>3</sub>-based ethereal solutions is here presented and aims at identifying the [AlCl<sub>2</sub>]<sup>+</sup> cation, which has been so far unambiguously characterized by <sup>27</sup>Al NMR spectrometry. To do that, ex...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-11-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/29/22/5377 |
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| Summary: | A Raman and IR study of AlCl<sub>3</sub>-based ethereal solutions is here presented and aims at identifying the [AlCl<sub>2</sub>]<sup>+</sup> cation, which has been so far unambiguously characterized by <sup>27</sup>Al NMR spectrometry. To do that, experimental–theoretical vibrational spectroscopy was so employed, and the data are interpreted successfully. As a known amount of water is added to the tetrahydrofuran (THF)-containing electrolyte, a Raman band at 271 cm<sup>−1</sup> has its intensity increased along with the most intense band of [AlCl<sub>4</sub>]<sup>−</sup>, and such behavior is also seen for a band at 405 cm<sup>−1</sup> in the IR spectra. New bands at around 420 and 400 cm<sup>−1</sup> are observed in both Raman and IR spectra for the tetraglyme (G4)-based systems. The [AlCl<sub>2</sub>(THF)<sub>4</sub>]<sup>+</sup> complex, in the <i>cis</i> and <i>trans</i> forms, is present in the cyclic ether, while the <i>cis</i>-[AlCl<sub>2</sub>(G4)]<sup>+</sup> isomer is identified in the acyclic one. |
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| ISSN: | 1420-3049 |