Electron paramagnetic resonance studies of the chelate-based ionic liquid in different solvents

The electron paramagnetic resonance spectra of the chelate-based ionic liquid [C10mim][Cu(F6-acac)3] in different solvents have been obtained at 120 K. It was found that the values of the 63Cu hyperfine coupling constants (AIL) of [C10mim][Cu(F6-acac)3] in molecular solvents were from 116 to 180 Gau...

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Veröffentlicht in:Green energy & environment 2020-07, Vol.5 (3), p.341-346
Hauptverfasser: Zhang, Songna, Wang, Xinyu, Yao, Jia, Li, Haoran
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Sprache:eng
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Zusammenfassung:The electron paramagnetic resonance spectra of the chelate-based ionic liquid [C10mim][Cu(F6-acac)3] in different solvents have been obtained at 120 K. It was found that the values of the 63Cu hyperfine coupling constants (AIL) of [C10mim][Cu(F6-acac)3] in molecular solvents were from 116 to 180 Gauss. Moreover, the AIL values in general ionic liquids are more complicated, and two sets of peaks can often be observed in their electron paramagnetic resonance spectra. Based on the Kamlet–Taft parameters, relative permittivity, the experimental results were discussed in terms of solvation effect and coordination of the solvents. By introducing of metal ions into ionic liquid, the chelate-based ionic liquid [C10mim][Cu(F6-acac)3] was synthesized and applied as an electron paramagnetic resonance spectra (EPR) probe to study the influence of solvents on coordination compound. A series of EPR experiments of the [C10mim][Cu(F6-acac)3] in different solvents both of molecular and general ionic liquid were performed. [Display omitted]
ISSN:2468-0257
2468-0257
DOI:10.1016/j.gee.2020.06.018