Eclipse 300

The molecular structure of the synthesized IL is depicted
in Table 8. Iodomethane
(≥99%, Sigma-Aldrich), n-decyl methyl sulfide
(97%, Alfa Aesar), and trifluoroacetic acid (99%, Sigma-Aldrich) were
employed in the synthesis. The compound was characterized by NMR.
The ¹H (300 MHz) spectrum was recorded on a JEOL Eclipse-300
equipment in DMSO-d₆, and chemical shifts
were expressed in ppm relative to tetramethylsilane as the internal
standard. Decyl(dimethyl)sulfonium iodide was synthesized according
to a similar previously described procedure.^{104 (link)}

The reagents
1-vinylimidazole (VIM, ≥99%), bromoethane (99%), and 1-bromobutane
(99%) were used to obtain 1-vinyl-3-ethylimidazole bromide ([VIMC2][Br])
and 1-vinyl-3-butylimidazole bromide ([VIMC4][Br]) monomers. N-Vinyl-2-pyrrolidone (VP, ≥99%) and acrylamide (AM,
≥98%) were used as comonomers. N,N′-Methylenebis(acrylamide) (BAM, 99%) was used as a cross-linking
agent, and 2,2′-azobis(2-methylpropionamidine) dihydrochloride
(V50, 97%) was used as the polymerization initiator. All reagents
were purchased from Sigma-Aldrich. High purity nitrogen gas (99.9%)
was used for degassing mixtures of reaction solutions and was purchased
from Praxair. ¹H NMR (300 MHz) spectra were obtained with
a Jeol Eclipse-300 equipment using tetramethylsilane (TMS) as the
internal standard and deuterated water or methanol as solvent at room
temperature. Infrared spectra were obtained on a Nicolet Nexus 470
FT-IR spectrometer in attenuated total reflection (ATR) mode. Molecular
weights were measured in a GPC Agilent series 1260 Infinity equipment
with 2 Aquagel-OH Mixed-H 8 μm × 7.5 mm columns connected
in series.
The thermal properties of PILs were determined by
high-resolution thermogravimetric analysis (TGA) using a Netzsch STA
409 in a nitrogen atmosphere at temperatures ranging from 30 to 600
°C (rate 5 °C/min).