Christopher Ikechukwu Ekeocha, Ikechukwu Nelson Uzochukwu, Ikenna Benedict Onyeachu, Ini-Ibehe Nabuk Etim, Emeka Emmanuel Oguzie
{"title":"新型抗吡啶衍生物作为酸性环境中低碳钢腐蚀抑制剂的理论研究","authors":"Christopher Ikechukwu Ekeocha, Ikechukwu Nelson Uzochukwu, Ikenna Benedict Onyeachu, Ini-Ibehe Nabuk Etim, Emeka Emmanuel Oguzie","doi":"10.1007/s11224-024-02368-4","DOIUrl":null,"url":null,"abstract":"<p>The research delved into studying the anti-corrosive capabilities of newly developed antipyrine derivatives for mild steel in an acidic environment through density functional theory (DFT) and molecular dynamic (MD) simulation. The results of DFT calculations indicated that the newly designed antipyrine molecules exhibited high E<sub>HOMO</sub> (− 4.788, − 4.908, and − 4.942) and low E<sub>LUMO</sub> (− 2.339, − 3.109, and − 3.101) and energy gap (2.449, 1.799, and 1.841) for compound A1, A2, and A3, respectively. This suggests their propensity to transfer and accept electrons during molecular interaction with the alloy surface, promoting adsorption and corrosion protection. The antipyrine molecules were also noted to contain numerous electron-rich sites around the heteroatoms, functional groups, and inherent aromatic rings within their structures which helps in facilitating molecular interaction with the metal, leading to the adsorption, and formation of a protective layer for effective corrosion protection. High AlogP values (3.74 to 5.00) strongly indicate the molecules' hydrophilic nature, coating ability, and propensity to disperse water molecules and chloride ions in the corrosive system. The MD simulations also revealed high energy of adsorption, which follows a decreasing trend of A2 (− 161.00 kcal⋅mol<sup>−1</sup>) > A1 (− 157.15 kcal⋅mol<sup>−1</sup>) > A3 (− 107.93 kcal⋅mol<sup>−1</sup>) indicating strong and spontaneous adsorption with a flat orientation on the Fe(110) surface. The radial distribution function (RDF) results further supported the chemosorption nature of the inhibitor molecule, and the formation of robust bonds with Fe(110) with all calculated RDF values falling below 3.5 Å. Inclusively, the investigated antipyrine compounds exhibited strong anti-corrosive properties, positioning them as promising corrosion inhibitors for mild steel deployed in acidic environments.</p>","PeriodicalId":780,"journal":{"name":"Structural Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Theoretical study of novel antipyrine derivatives as promising corrosion inhibitors for mild steel in an acidic environment\",\"authors\":\"Christopher Ikechukwu Ekeocha, Ikechukwu Nelson Uzochukwu, Ikenna Benedict Onyeachu, Ini-Ibehe Nabuk Etim, Emeka Emmanuel Oguzie\",\"doi\":\"10.1007/s11224-024-02368-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The research delved into studying the anti-corrosive capabilities of newly developed antipyrine derivatives for mild steel in an acidic environment through density functional theory (DFT) and molecular dynamic (MD) simulation. The results of DFT calculations indicated that the newly designed antipyrine molecules exhibited high E<sub>HOMO</sub> (− 4.788, − 4.908, and − 4.942) and low E<sub>LUMO</sub> (− 2.339, − 3.109, and − 3.101) and energy gap (2.449, 1.799, and 1.841) for compound A1, A2, and A3, respectively. This suggests their propensity to transfer and accept electrons during molecular interaction with the alloy surface, promoting adsorption and corrosion protection. The antipyrine molecules were also noted to contain numerous electron-rich sites around the heteroatoms, functional groups, and inherent aromatic rings within their structures which helps in facilitating molecular interaction with the metal, leading to the adsorption, and formation of a protective layer for effective corrosion protection. High AlogP values (3.74 to 5.00) strongly indicate the molecules' hydrophilic nature, coating ability, and propensity to disperse water molecules and chloride ions in the corrosive system. The MD simulations also revealed high energy of adsorption, which follows a decreasing trend of A2 (− 161.00 kcal⋅mol<sup>−1</sup>) > A1 (− 157.15 kcal⋅mol<sup>−1</sup>) > A3 (− 107.93 kcal⋅mol<sup>−1</sup>) indicating strong and spontaneous adsorption with a flat orientation on the Fe(110) surface. The radial distribution function (RDF) results further supported the chemosorption nature of the inhibitor molecule, and the formation of robust bonds with Fe(110) with all calculated RDF values falling below 3.5 Å. Inclusively, the investigated antipyrine compounds exhibited strong anti-corrosive properties, positioning them as promising corrosion inhibitors for mild steel deployed in acidic environments.</p>\",\"PeriodicalId\":780,\"journal\":{\"name\":\"Structural Chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2024-09-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Structural Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1007/s11224-024-02368-4\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Structural Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1007/s11224-024-02368-4","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Theoretical study of novel antipyrine derivatives as promising corrosion inhibitors for mild steel in an acidic environment
The research delved into studying the anti-corrosive capabilities of newly developed antipyrine derivatives for mild steel in an acidic environment through density functional theory (DFT) and molecular dynamic (MD) simulation. The results of DFT calculations indicated that the newly designed antipyrine molecules exhibited high EHOMO (− 4.788, − 4.908, and − 4.942) and low ELUMO (− 2.339, − 3.109, and − 3.101) and energy gap (2.449, 1.799, and 1.841) for compound A1, A2, and A3, respectively. This suggests their propensity to transfer and accept electrons during molecular interaction with the alloy surface, promoting adsorption and corrosion protection. The antipyrine molecules were also noted to contain numerous electron-rich sites around the heteroatoms, functional groups, and inherent aromatic rings within their structures which helps in facilitating molecular interaction with the metal, leading to the adsorption, and formation of a protective layer for effective corrosion protection. High AlogP values (3.74 to 5.00) strongly indicate the molecules' hydrophilic nature, coating ability, and propensity to disperse water molecules and chloride ions in the corrosive system. The MD simulations also revealed high energy of adsorption, which follows a decreasing trend of A2 (− 161.00 kcal⋅mol−1) > A1 (− 157.15 kcal⋅mol−1) > A3 (− 107.93 kcal⋅mol−1) indicating strong and spontaneous adsorption with a flat orientation on the Fe(110) surface. The radial distribution function (RDF) results further supported the chemosorption nature of the inhibitor molecule, and the formation of robust bonds with Fe(110) with all calculated RDF values falling below 3.5 Å. Inclusively, the investigated antipyrine compounds exhibited strong anti-corrosive properties, positioning them as promising corrosion inhibitors for mild steel deployed in acidic environments.
期刊介绍:
Structural Chemistry is an international forum for the publication of peer-reviewed original research papers that cover the condensed and gaseous states of matter and involve numerous techniques for the determination of structure and energetics, their results, and the conclusions derived from these studies. The journal overcomes the unnatural separation in the current literature among the areas of structure determination, energetics, and applications, as well as builds a bridge to other chemical disciplines. Ist comprehensive coverage encompasses broad discussion of results, observation of relationships among various properties, and the description and application of structure and energy information in all domains of chemistry.
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