Studies on adsorption and corrosion inhibitive properties of quinoline derivatives on N80 steel in 15% hydrochloric acid

Ansari, K.R.; Ramkumar, Sowmya; Nalini, D.; Quraishi, M.A.

doi:10.1080/23312009.2016.1145032

Cited by 28 publications

(10 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Quinolines are an important class of natural or synthetic heterocycles in the chemistry of materials and are used as fluorescence probes, in photoinduced electron transfer with emission of green coloration, as corrosion inhibitors and as food and cosmetic dyes . In pharmacological chemistry, molecules containing modified quinolines are potentially antimalarial drugs, antineoplastic agents as well as antituberculosis probes for Au(III) ion screening in living cells.…”

Section: Introductionmentioning

confidence: 99%

Oxazolidine copper complexes: Synthesis, characterization and superoxide dismutase activity of copper(II) complexes with oxazolidine ligands derived from hydroxyquinoline carboxaldehyde

Ceolin

Siqueira

Martins

et al. 2018

Applied Organom Chemis

View full text Add to dashboard Cite

ProcThis work describes the synthesis of copper(II) complexes, their identification using spectroscopic and electrochemical methods, structural characterization with X-ray diffraction and density functional theory calculations (DFT), as well as their catalytic activity mimicking that of superoxide dismutase. Structural analysis revealed the formation of complexes with cyclization of ligands L1 and L2 with the formation of a heterocycle, 1,3-oxazolidine. The DFT calculations confirmed this trend by stabilizing with lower energy. In addition, evaluations of mimetic enzymatic activity of complexes C1, C2, C3 and C4 revealed promising IC 50 values compared to other results seen in the literature (IC 50 = 0.22, 0.328, 0.55 and 0.92). Also, calf thymus DNA interactive experiments using UV-visible spectroscopy were conducted in the presence of the copper(II) complexes.

show abstract

Section: Introductionmentioning

confidence: 99%

Oxazolidine copper complexes: Synthesis, characterization and superoxide dismutase activity of copper(II) complexes with oxazolidine ligands derived from hydroxyquinoline carboxaldehyde

Ceolin

Siqueira

Martins

et al. 2018

Applied Organom Chemis

View full text Add to dashboard Cite

show abstract

“…The HOMO distribution predicts the region susceptible for electron donation and in these cases it is localized mainly over the hetero atoms in plane with the adjacent double bond for all the compounds. Consequently, this is the preferred zone of the molecule interaction with the metal surface . Higher HOMO energy ( E HOMO ) of the molecule means a higher electron donating ability of the inhibitor to appropriate acceptor molecules.…”

Section: Resultsmentioning

confidence: 99%

“…In HCl solution, heteroatom(s) of the studied heterocyclic compounds might be protonated. Thus in aqueous acidic solution, the imidazoline and isoxazoline derivatives may exist either in their neutral or in their cationic (protonated) forms . The imidazoline and isoxazoline derivatives can also be adsorbed on the metal surface via the donor‐acceptor interaction between the unshared electrons pairs of the heteroatom and pi‐electrons of the aryl ring with the vacant d ‐orbital of iron.…”

Section: Resultsmentioning

confidence: 99%

Anti‐corrosive property of bioinspired environmental benign imidazole and isoxazoline heterocyclics: A cumulative studies of experimental and DFT methods

Ramkumar¹,

Nalini²,

Quraishi

et al. 2019

Journal of Heterocyclic Chem

Self Cite

View full text Add to dashboard Cite

In the present study, four imidazoline (IDZ) and four isoxazolines (ISO) heterocyclics differing in the nature of methoxy (-OCH 3 ) and aromatic (phenyl and naphthyl) moieties are synthesized, characterized and evaluated as corrosion inhibitors for mild steel in acidic solution of 1 M HCl. Results showed that imidazoline based heterocyclic compounds are better corrosion inhibitors than isoxazoline based heterocyclics and both classes of compounds showed inhibition efficiency of more than 85% at 20 mgL −1 concentration. Results further showed that inhibitors containing methoxy, phenyl, and naphthyl moieties showed higher protection efficiency as compared to the inhibitors without these moieties. PDP Study revealed that investigated IDZs and ISOs acted as mixed type inhibitors and their adsorption on the metallic surface followed the Langmuir adsorption isotherm model. All the experimental results were corroborated by density function theory (DFT) based quantum chemical calculations. Numerous DFT based indices calculated for neutral as well as protonated forms of the IDZs and ISOs in order to get better insight about metal-IDZs/ISOs interactions. Outcomes of the DFT analysis showed that protonated (cationic) form of the all the inhibitors are more strongly adsorbed on the metallic surface as compared to their neutral form.

show abstract

“…3, the experimental curves are best fit and the electrochemical parameters are obtained. The results shows that as inhibitor concentration increases there is an increase in the R p and decreases in C dl 43 . R p values are increases with inhibitor concentration designates growth in the θ, causing the inhibition efficiency increases.…”

Section: Potentiodynamic Polarization Measurementsmentioning

confidence: 88%

Glyceral Trinitrate: As Potential Corrosion Protector for Mild Steel in Acid Medium Along with Paint-coated Steel in a Saline Environment

Menaga¹,

Ramkumar²,

Nalini³

2021

Orient. J. Chem

Self Cite

View full text Add to dashboard Cite

The importance of mild steel lies in its industrial applications, and the fight against corrosion is very important from an ecological, economic, technical, and aesthetic view. The current study involves the use of pharmaceutical drugs namely GTN towards corrosion inhibiting reaction was examined by gravimetric and electrochemical approaches. From weight loss studies, maximum I.E (%) 94.04% reached for 60 mg/L concentration of GTN for 6 hrs immersion time. The Polarization measurements showed that the behaviour of GTN as mixed nature and surface assimilation of GTN at the superficial, such that water molecules are substituted at the solution-metal boundary. The corrosion resistance property of the studied inhibitor as coating was also evaluated in NaCl which shows better progress corrosion retardation property of coating in the saline medium. Theoretical calculations were employed using DFT to correlate with the experimental observations.

show abstract

Studies on adsorption and corrosion inhibitive properties of quinoline derivatives on N80 steel in 15% hydrochloric acid

Cited by 28 publications

References 21 publications

Oxazolidine copper complexes: Synthesis, characterization and superoxide dismutase activity of copper(II) complexes with oxazolidine ligands derived from hydroxyquinoline carboxaldehyde

Oxazolidine copper complexes: Synthesis, characterization and superoxide dismutase activity of copper(II) complexes with oxazolidine ligands derived from hydroxyquinoline carboxaldehyde

Anti‐corrosive property of bioinspired environmental benign imidazole and isoxazoline heterocyclics: A cumulative studies of experimental and DFT methods

Glyceral Trinitrate: As Potential Corrosion Protector for Mild Steel in Acid Medium Along with Paint-coated Steel in a Saline Environment

Contact Info

Product

Resources

About