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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2009,Vol.25>> Issue(12)>> 2524-2530     doi: 10.3866/PKU.WHXB20091126         中文摘要
QSAR and Molecular Design of Imidazoline Derivatives as Corrosion Inhibitors
HU Song-Qing, HU Jian-Chun, SHI Xin, ZHANG Jun, GUO Wen-Yue
College of Physis Science and Technology, China University of Petroleum, Dongying 257061, Shandong Province, P. R. China
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The quantitative structure-activity relationship (QSAR) of undecyl imidazoline corrosion inhibitors for anti-corrosion behavior towards hydrogen sulfide and carbon dioxide was studied using density functional theory (DFT) and regression analysis methods. A stepwise regression analysis was used to determine the main independent factors that affected the activity of the compounds and a QSAR model was established. The stability and predictive ability of the model were examined by“leave-one-out”(LOO) cross-validation method. We found that the electron transfer parameter (△N), the electrostatic charge of non-hydrogen atoms in the imidazole ring (∑Qring) and the mean molecular polarizability (α) were the main independent factors that contributed to corrosion inhibition. The fitting correlation coefficient (R2) and the cross-validation coefficient (q2) values were 0.924 and 0.917, respectively. These values indicate that the model is of significant statistical quality and has an excellent predictive ability for corrosion inhibitors. Based on this established model, new molecules with high anti-corrosion properties for hydrogen sulfide and carbon dioxide were theoretically designed. This model may be used as a theoretical reference for the design of new corrosion inhibitors.



Keywords: Corrosion inhibition performance   Imidazoline derivative   Quantumchemistry parameter   Quantitative structure-vity relationship   Molecular design  
Received: 2009-06-16 Accepted: 2009-08-17 Publication Date (Web): 2009-09-29
Corresponding Authors: GUO Wen-Yue Email: wyguo@hdpu.edu.cn


Cite this article: HU Song-Qing, HU Jian-Chun, SHI Xin, ZHANG Jun, GUO Wen-Yue. QSAR and Molecular Design of Imidazoline Derivatives as Corrosion Inhibitors[J]. Acta Phys. -Chim. Sin., 2009,25 (12): 2524-2530.    doi: 10.3866/PKU.WHXB20091126
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