Identification of radiolytic products of [C4mim][NTf2] and their effects on the Sr2+ extraction

Abstract

The trace water-soluble radiolytic products of neat 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C(4)mim][NTf(2)]) were identified by analysing water-washed samples of γ-ray irradiated ionic liquids. CF(3)SO(2)OH, CF(3)SOOH, CF(3)SO(2)NH(2), HF and H(2)SO(3) were confirmed as main radiolytic products of [C(4)mim][NTf(2)], and the total radiation chemical yields of the water-soluble radiolytic products (0.35 μmol J(-1)) and that of hydrogen ions (0.46 ± 0.02 μmol J(-1)) were determined by using ion chromatography and neutralization titration, respectively. It was found that the water-soluble radiolytic products of [C(4)mim][NTf(2)] greatly reduced the extraction efficiency of Sr(2+) from water to irradiated [C(4)mim][NTf(2)], while the water-insoluble radiolytic products of [C(4)mim][NTf(2)] had a slight influence on the Sr(2+) extraction.

Post-synthetic fluorination of Scholl-coupled microporous polymers for increased CO2 uptake and selectivity

“…À anions from Selectuor® might be trapped within some of the networks, due to the presence of peaks in the region of À78.5 and À150 ppm, respectively. 58,59 In the case of SC-uoranthene, SC-triptycene, and SC-triphenylene, the 13 C NMR did not show the expected C-F bond at 182-192 ppm. We attribute this to their low uorine loading (<1.1 wt%), which might be below the limit of detection for the analysis (Fig.…”

Solvent extraction fractionation of manganese, cobalt, nickel and lithium using ionic liquids and deep eutectic solvents

“…The characteristic bands of TODGA and the IL are listed in Table 4. (Zheng et al, 2009) NTf 2 -C-F 1224 cm -1 and 1137 cm -1 (Ao et al, 2013), (Nguyen et al, 2015) TODGA C=O stretching 1653 cm -1 (Shaibu et al, 2007) The FT-IR spectra recorded before and after extraction of Mn(II) (Fig. 6) show a clear displacement of the C=O characteristic vibration band of TODGA from 1649 to 1620 cm -1 after extraction, thus evidencing the interaction between TODGA and Mn(II).…”

Spontaneous emulsification in ionic liquid/water systems and its use for templating of solids

“…The only difference between spectra of neat [Ch][NTf2] and [Ch]-[NTf2] dispersed and/or dissolved in the aqueous phase of the [Ch][NTf2]/Na 2 CO 3 biphasic system is a shi of the C-F peak 13 to higher wavenumbers (Fig. 2, arrow) and a change in proportions of pairs of C-F and S]O peaks 13 of the [NTf2] À anion (relative suppression of the respective signals on the right to 1182 cm À1 , Fig. 2, shaded area).…”

“…Na + has stronger affinity for water and its dehydration costs are relatively high. Therefore it will extract IL anions into the aqueous phase, rather than exchange with the IL cations (right-hand broadening of the S]O signal 13 (Fig. 3b, shaded ellipse) suggests S]O/Na interaction).…”