Editors’ choice-the effect of anchor group and alkyl backbone chain on performance of organic compounds as corrosion inhibitors for aluminum investigated using an integrative experimental-modeling approach was written by Milosev, I.;Zimerl, D.;Carriere, Ch.;Zanna, S.;Seyeux, A.;Iskra, J.;Stavber, S.;Chiter, F.;PoberZnik, M.;Costa, D.;Kokalj, A.;Marcus, P.. And the article was included in Journal of the Electrochemical Society in 2020.COA of Formula: C11H20N2 This article mentions the following:
An alk. etched, superhydrophilic Al surface was modified using functionalized alkyl compounds selected to study the effect of their properties on adsorption on the metal surface. The thirteen organic compounds differed in alkyl chain length (eight and eighteen C atoms) and anchor group (azide, imidazole, thiocyanate, amino, disulfide, thiol, phosphonic, carboxylic, and benzoic). The methodol. of the study integrated a complete chain of steps incorporating synthesis, electrochem. and surface analyses, and computational modeling. The corrosion resistant and superhydrophobic properties depend on the anchor group, which governs adhesion to the surface, and backbone, which is responsible for lateral cohesive interactions. The morphol. and chem. composition of modified layers were studied using SEM, XPS and time-of-flight secondary ion mass spectrometry. Electrochem. and long-term immersion properties were studied in 0.5M NaCl. Calculations based on d. functional theory were performed as to model the adsorption of selected anchor groups on the hydroxylated oxidized Al surface. Integrated results allowed the identification of the anchor groups that are able to form inhibitive adsorbed layers on Al surface regardless the alkyl chain length, and those that are not able to form adsorbed layers at all and are thus not efficient corrosion inhibitors. In the experiment, the researchers used many compounds, for example, 1-Octyl-1H-imidazole (cas: 21252-69-7COA of Formula: C11H20N2).
1-Octyl-1H-imidazole (cas: 21252-69-7) belongs to imidazole derivatives. The solubility of imidazoles in ethers is lower than that in alcohols and decreases with increasing chain length of the ethers . In contrast, the solubility of benzimidazoles in alcohols (C3鈥揅6) is higher than in water and generally decreases with a Imidazole is incorporated into many important biological compounds. The most pervasive is the amino acid histidine, which has an imidazole side-chain. Histidine is present in many proteins and enzymes, e.g. by binding metal cofactors, as seen in hemoglobin.COA of Formula: C11H20N2
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem