Synthesis and performance analysis of dibenzotriazole ionic liquid

Dibenzotriazole (diBTA) ionic liquid was synthesised via a three-pot method, with optimisation of the reaction conditions. Characterisation was conducted using 1H-NMR and mass spectrometry (MS) analyses. Thermal stability was assessed through thermogravimetric analysis, while corrosion inhibition performance was evaluated using static weight loss, electrochemical analysis, and scanning electron microscopy (SEM). Tribological performance was measured using a four-ball machine and compared against base oil, with SEM utilised for surface morphology and elemental analysis. The diBTA ionic liquid demonstrated favourable thermal stability, corrosion inhibition, and lubricating properties. Furthermore, the structural analysis of the diBTA ionic liquid was conducted via quantum chemical methods, exploring molecular structure, charge distribution, orbital energy, atomic coordination binding energy with Cu, and characteristics of coordination compounds. The calculated results aligned with the experimental findings.