WU Gang, HAO Ningmei, LIAN Bingjie, et al. Density functional theory analysis on pyridine corrosion inhibitors and adsorption behavior on Al(111)surface[J]. CIESC Journal, 2013, (7): 2565-2572.
WU Gang, HAO Ningmei, LIAN Bingjie, et al. Density functional theory analysis on pyridine corrosion inhibitors and adsorption behavior on Al(111)surface[J]. CIESC Journal, 2013, (7): 2565-2572.DOI: 10.3969/j.issn.0438-1157.2013.07.035.
The reactivity and inhibition performance on Al (111)surface of three pyridine molecules (pyridine
3-methylpyridine and 4-methylpyridine)was studied by using the density functional theory (DFT).The results showed that the frontier orbitals of the three corrosion inhibitor molecules
including the highest occupied molecular orbital (HOMO)and lowest unoccupied molecular orbital (LUMO)
were all distributed on the pyridine ring
and both the nucleophilic and electrophilic activity centers of the three molecules were mainly concentrated at the heteroatoms N atom.Moreover
all of the three corrosion inhibitor molecules could perpendicularly chemisorb on Al surface via N atom
and the order of adsorption energy agreed with the inhibition efficiency obtained by experiment.The strong effect of N-Al bonding resulted from the atomic orbits hybridization.Additionally
3-methylpyridine and 4-methylpyridine could also nearly parallel physisorb on the Al (111)surface.