席夫碱缓蚀剂的实验与理论研究。

Q1 Chemistry Chemistry Central Journal Pub Date : 2018-02-05 DOI:10.1186/s13065-018-0376-7
Dalia M Jamil, Ahmed K Al-Okbi, Shaimaa B Al-Baghdadi, Ahmed A Al-Amiery, Abdulhadi Kadhim, Tayser Sumer Gaaz, Abdul Amir H Kadhum, Abu Bakar Mohamad
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引用次数: 85

摘要

背景:相对便宜、稳定的希夫碱3-((4-羟基苄基)氨基)-2-甲基喹唑啉-4(3H)- 1 (BZ3)和3-((4-(二甲氨基)苄基)氨基)-2-甲基喹唑啉-4(3H)- 1 (BZ4)被用来作为强酸对低碳钢的高效缓蚀剂。结果:采用减重法对其抑菌效果进行了评价。并利用扫描电镜对其抑制机理进行了研究。采用傅里叶变换红外光谱、核磁共振光谱和微量元素分析对合成的席夫碱进行了表征。缓蚀剂的缓蚀效率取决于三个因素:缓蚀剂中的氮含量、缓蚀剂浓度和缓蚀剂分子量。结论:在最大浓度下,BZ4和BZ3的抑菌率分别为96%和92%。对BZ3和BZ4进行密度泛函理论计算,比较羟基和N,N-二甲胺取代基对抑制效率的影响,为设计具有更高抑制效率的新分子结构提供见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Experimental and theoretical studies of Schiff bases as corrosion inhibitors.

Background: Relatively inexpensive, stable Schiff bases, namely 3-((4-hydroxybenzylidene)amino)-2-methylquinazolin-4(3H)-one (BZ3) and 3-((4-(dimethylamino)benzylidene)amino)-2-methylquinazolin-4(3H)-one (BZ4), were employed as highly efficient inhibitors of mild steel corrosion by corrosive acid.

Findings: The inhibition efficiencies were estimated based on weight loss method. Moreover, scanning electron microscopy was used to investigate the inhibition mechanism. The synthesized Schiff bases were characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy and micro-elemental analysis. The inhibition efficiency depends on three factors: the amount of nitrogen in the inhibitor, the inhibitor concentration and the inhibitor molecular weight.

Conclusions: Inhibition efficiencies of 96 and 92% were achieved with BZ4 and BZ3, respectively, at the maximum tested concentration. Density functional theory calculations of BZ3 and BZ4 were performed to compare the effects of hydroxyl and N,N-dimethylamino substituents on the inhibition efficiency, providing insight for designing new molecular structures that exhibit enhanced inhibition efficiencies.

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来源期刊
Chemistry Central Journal
Chemistry Central Journal 化学-化学综合
CiteScore
4.40
自引率
0.00%
发文量
0
审稿时长
3.5 months
期刊介绍: BMC Chemistry is an open access, peer reviewed journal that considers all articles in the broad field of chemistry, including research on fundamental concepts, new developments and the application of chemical sciences to broad range of research fields, industry, and other disciplines. It provides an inclusive platform for the dissemination and discussion of chemistry to aid the advancement of all areas of research. Sections: -Analytical Chemistry -Organic Chemistry -Environmental and Energy Chemistry -Agricultural and Food Chemistry -Inorganic Chemistry -Medicinal Chemistry -Physical Chemistry -Materials and Macromolecular Chemistry -Green and Sustainable Chemistry
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