Effect of alkylimidazolium ionic liquids on the corrosion inhibition of copper in sulfuric acid solution was written by Zhang, Qi-Bo;Hua, Yi-Xin. And the article was included in Wuli Huaxue Xuebao in 2011.Synthetic Route of C10H20N2O4S The following contents are mentioned in the article:
The effects of three newly synthesized alkylimidazolium based ionic liquids: 1-butyl-3- methylimidazolium hydrogen sulfate ([BMIM]HSO4), 1-hexyl-3-methylimidazolium hydrogen sulfate ([HMIM]HSO4), and 1-octyl-3-methylimidazolium hydrogen sulfate ([OMIM]HSO4), on the corrosion inhibition of Cu in 0.5 mol/L-1 H2SO4 solution were investigated using potentiodynamic polarization and electrochem. impedance spectroscopy. All the measurements show that these alkylimidazolium ionic liquids are excellent inhibitors for Cu in H2SO4 media and the effectiveness of these inhibitors decreases as follows: [OMIM]HSO4 > [HMIM]HSO4 > [BMIM]HSO4 at the same concentration Potentiodynamic polarization studies indicate that the three inhibitors are mixed type inhibitors and that both the cathodic and anodic processes of Cu corrosion are suppressed. The electrochem. impedance results were evaluated using an equivalent circuit in which two constant phase elements (CPE) were offered for these systems with 2 time constants Changes in impedance parameters (charge transfer resistance and double layer capacitance) with the addition of the inhibitors also suggest that these imidazolium based mols. act by adsorbing at the Cu/solution interface. The adsorption of these imidazolium based compounds on the Cu surface in an acidic solution is found to fit the Langmuir adsorption isotherm. Thermodn. calculations reveal that the adsorption of inhibitors on the metal surface occurs by a physisorption-based mechanism involving a spontaneous process. This study involved multiple reactions and reactants, such as 1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate (cas: 478935-29-4Synthetic Route of C10H20N2O4S).
1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate (cas: 478935-29-4) belongs to imidazole derivatives. Imidazole derivatives generally have good solubility in protic solvents. Simple imidazole derivatives, such as 1H-imidazole, 2-methyl-1H-imidazole, and 1,2-dimethylimidazole, have very high solubility in water. This ring system is present in important biological building blocks, such as histidine and the related hormone histamine.Synthetic Route of C10H20N2O4S
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem