Esulfonate ([OTf]), dicyanamide ([DCA]), and hexafluorophosphate ([PF6 ]). WZ8040 Protocol Additionally they investigated the
Esulfonate ([OTf]), dicyanamide ([DCA]), and hexafluorophosphate ([PF6 ]). In addition they investigated the impact of alkyl chain length around the cation making use of 1-octyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Omim][Tf2 N]), 1-hexyl-3methylimidazolium bis(trifluoromethylsulfonyl)imide ([Hmim][Tf2 N]), and two,3-dimethyl1-hexylimidazolium bis(trifluoromethylsulfonyl)imide ([DMHxIm][Tf2 N]). The outcomes show that the solubility of carbon dioxide is mainly dependent around the anions, and it truly is greater in anions that contain fluoroalkyl groups including [Tf2 N] and [methide]. They attributed this towards the acid/base interactions of CO2 with anions. They also noted that the CO2 solubility slightly increases when the alkyl chain length of the cation increases because of a larger totally free volume in the ILs with longer alkyl chains. However, Anthony and Anderson [98] studied the solubility of different gases (carbon monoxide, oxygen, carbon dioxide, ethylene, ethane, nitrous oxide, and Methyl jasmonate manufacturer benzene) in butyl-methyl pyrrolidinium bis(trifluoromethylsulfonyl) imide, tri-isobutyl-methyl phosphonium p-toluenesulfonate, and methyl-tributylammonium bis(trifluoromethylsulfonyl) imide, where they observed that carbon dioxide and nitrous oxide have powerful interactions with ILs followed by interactions with ethylene and ethane. On the other hand, oxygen has demonstrated really poor solubility and restricted interaction with ILs. For carbon monoxide, the authors couldn’t detect the solubility due to limitations with their apparatus. They concluded that the ILs using the bis(trifluoromethylsulfonyl) imide anion had the highest CO2 solubility, irrespective of no matter whether the cation was tetraalkylammonium, pyrrolidinium, or imidazolium. Their study highlighted that anions have the most considerable impact on gas solubilities. Similarly, Almantariotis and Stevanovic studied the absorption of carbon dioxide, nitrogen, ethane, and nitrous oxide by 1-alkyl-3-methylimidazolium (Cn mim, n = two,four,6) tris(pentafluoroethyl)trifluorophosphate ionic liquids (FAP). They observed thatMolecules 2021, 26,12 ofthe ILs containing hugely fluorinated anions (tris(pentafluoroethyl)trifluorophosphate [FAP]) recorded the highest CO2 solubility amongst the ILs for the exact same cations [91]. They noted that amino acid-based ILs have high CO2 solubility as a result of the interaction between carbon dioxide and amino functional groups [99,100]. Snuffin and Whaley [90] observed that the electroreduction of CO2 in 1-butyl-3methylimidazolium tetrafluoroborate [Bmim][BF4 ] and 1-butyl-3-methylimidazolium bis(trifluormethylsulfonyl)imide [Bmim][TF2 N] is ineffective in comparison to [Emim][BF3 Cl], which has a C3 -symmetric tetrahedral structure. They noted that the dative B-Cl covalent bond isn’t as robust because the ordinary B-F covalent bond. The B-Cl bond-length was 0.173 nm, that is 33 greater than the B-F bond length of 0.130 nm. They reported that the dissolved CO2 molecules may well replace the Cl atoms within the BF3 Cl by forming BF3 -CO2 adducts. On the other hand, the oxygen atoms of CO2 are Lewis bases; for that reason, the BF3 can kind a Lewis acid ase adduct with CO2 . They studied [Emim][BF3 Cl] IL as an electrolyte for the electrochemical reduction of CO2 at 1 atm and 25 C on a platinum electrode and discovered that the reaction occurred at -1.8 V vs. Ag wire, which is less damaging than previously reported investigation, where the reaction occurred at -2.4 V vs. Ag/AgCl in 1-butyl-3-methylimidazolium tetrafluoroborate [Bmim][BF4 ] on a Cu e.