Preparation of triazole compounds via click chemistry reaction and formation of the protective self-assembled membrane against copper corrosion

The triazole inhibitors of 2-(1-tosyl-1H-1,2,3-triazol-4-yl)-ethanol (TTE) and 2-(1-tosyl-1H-1,2,3-triazol-4-yl)propan-2-ol (TTP) were synthesized via the click chemistry reaction. Self-assembling technique was used to form self-assembled membrane (SAM) of TTE and TTP on copper surface. The electrochemical measurement results indicate that the TTE and TTP film can strongly suppress copper corrosion in 3 wt.% NaCl solution and the inhibition efficiency of TTE and TTP are 89.4% and 93.1%, respectively. TTP shows better inhibition performance than TTE. Polarization curves show that TTE and TTP predominantly retard the anodic process of the corrosion reaction. The results of quantum chemical calculations and molecule dynamics (MD) simulations reveal that the formation of TTE and TTP SAM on copper surface is mainly achieved by the adsorption of triazole ring and 0 atoms at horizontal orientation.