Wei N, Jiang Y, Liu Z, Ying Y, Guo X, Wu Y, Wen Y, Yang H
The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Department of Chemistry, Shanghai Normal University Shanghai 200234 PR China
RSC Adv. 2018 Feb 15;8(14):7340-7349. doi: 10.1039/c7ra12256j. eCollection 2018 Feb 14.
4-Phenylpyrimidine (4-PPM) containing N heteroatoms can easily form compact and uniform layers on metallic surfaces. In this work, the protection of a copper surface from corrosion in 3 wt% NaCl by a 4-PPM layer was investigated by electrochemical impedance spectroscopy (EIS) and polarization methods. Under optimum conditions, the inhibition efficiency of a 4-PPM layer for copper corrosion reached 83.2%. Raman analysis in conjunction with calculations using density functional theory (DFT) based on the B3LYP/LANL2DZ basis set suggested that the 4-PPM molecule anchored on the copper surface the N atom to construct a uniform layer.
含有氮杂原子的4-苯基嘧啶（4-PPM）能够轻易在金属表面形成致密且均匀的层。在本工作中，通过电化学阻抗谱（EIS）和极化方法研究了4-PPM层对铜表面在3 wt% NaCl溶液中的腐蚀防护作用。在最佳条件下，4-PPM层对铜腐蚀的抑制效率达到了83.2%。结合基于B3LYP/LANL2DZ基组的密度泛函理论（DFT）计算的拉曼分析表明，4-PPM分子通过氮原子锚定在铜表面以构建均匀层。
