Targeted synthesis of cadmium(<scp>ii</scp>) Schiff base complexes towards corrosion inhibition on mild steel

Das, Mriganka; Biswas, Amrita; Kundu, Bidyut Kumar; Mobin, Shaikh M.; Udayabhanu, G.; Mukhopadhyay, Suman

doi:10.1039/c7ra08633d

Cited by 48 publications

(22 citation statements)

References 78 publications

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“…19 Geometry optimization in the gas phase for the DGEBA-polyaminoamide was completely optimized at B3LYP/6-31 g (d, p) level of the theory. [20][21][22][23] Our frequency calculation showed there was not any imaginary frequency with N Imag = 0, which confirms that the optimized structure presupposed for the compound corresponds to the minimum energy.…”

Section: Methodssupporting

confidence: 61%

“…In the last few years, DFT has appeared as an effective computation tool for describing the interactions between metal surface and coating. 21,[37][38][39] The optimized structure, frontier molecule orbital density distributions (HOMO and LUMO), and electrostatic potential (ESP)of the DGEBA-polyaminoamide are shown in Figure 4.The related quantum chemical parameters are summarized in Table II. Figure 4 presents the optimized DGEBA-polyaminoamide structure and the plots of HOMO, LUMO as well as ESP.…”

Section: Surface Morphologymentioning

confidence: 99%

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DGEBA‐polyaminoamide as effective anti‐corrosive material for 15CDV6 steel in NaCl medium: Computational and experimental studies

Dagdag

Berisha

Safi

et al. 2019

J of Applied Polymer Sci

111

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The present study is focusing on evaluating theoretically and experimentally stability and type of interactions between the epoxy resin bisphenol A diglycidyl ether (DGEBA)‐polyaminoamide anticorrosive coating and high strength low alloy steel surface 15CDV6. The coated steel samples were subjected to a harsh environment of an electrolyte solution of 3 wt % NaCl to simulate the corrosive marine environment. The performance of the epoxy coating was investigated using electrochemical impedance spectroscopy (EIS). The EIS results revealed the occurrence of some deterioration in the film after subjecting it to a harsh environment for 4392 h, because the impedance of the coating dropped by about 1.4 kΩ.cm2. Surface morphological study of metallic specimens before and after exposing to the simulated marine environment (3 wt % NaCl) was carried out using scanning electron microscopy, energy dispersive spectroscopy (EDS), and optical microscope (OM) methods. The interactions between DGEBA‐polyaminoamide and the metallic surface were further carried out using computation modeling such as density functional theory (DFT)‐based quantum chemical calculations, Monte Carlo (MC), and molecular dynamics (MD) simulations. Results showed that DGEBA‐polyaminoamide possesses a strong tendency to adhere and inhibits the corrosive dissolution of 15CDV6 steel surface in the stimulated marine environment. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48402.

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Section: Methodssupporting

confidence: 61%

Section: Surface Morphologymentioning

confidence: 99%

DGEBA‐polyaminoamide as effective anti‐corrosive material for 15CDV6 steel in NaCl medium: Computational and experimental studies

Dagdag

Berisha

Safi

et al. 2019

J of Applied Polymer Sci

111

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“…Consequently, the adsorbed compounds act by unpretentious blocking of active sites for both cathodic and anodic reactions . The E PDP depends on different factors such as adsorption center, interaction mode, size and structure . E PDP increases with the compound doses.…”

Section: Resultsmentioning

confidence: 99%

“…Organic compounds containing Schiff base groups >C=N―, S, P, O, N and aromatic rings are reported in literature as most efficient corrosion inhibitors for the metals and alloys in acidic solutions . The chelates of Schiff bases form stable complexes neatly packed in the coordination metal ion sphere to generate another category of compounds for corrosion inhibition …”

Section: Introductionmentioning

confidence: 99%

Sulfonated salicylidene thiadiazole complexes with Co (II) and Ni (II) ions as sustainable corrosion inhibitors and catalysts for cross coupling reaction

El‐Lateef

Sayed

Adam

2019

Applied Organom Chemis

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Condensation of 2,5-dihydrazinyl thiadiazole with 5-sodium sulfonate salicylaldehyde afforded dibasic tetradentate pincer N,O,O,N-salicyldiene thiadiazole ligand (H 2 Sanp). The novel dipolar ligand formed para-magnetic pincer complexes within Co (II) and Ni (II) ions (Co-Sanp and Ni-Sanp) under sustainable conditions. The water-soluble ligand and its metal-complexes were estimated by mass, IR and UV-Visible spectroscopy, EA (elemental analyses), TGA (Thermogravimetric analyses), magnetic susceptibility, and conductivity measurements. The catalytic reactivity of Co-Sanp and Ni-Sanp were evaluated in the Suzuki and Buchwald-Hartwig cross coupling reaction in aqueousmethanol binary mixtures. Both reactions of boronic acid or aryl amines with aryl halides gave high chemoselective yield of C-C or C-N product. The inhibition characteristics of H 2 Sanp and its Ni-and Co-complexes were performed for the C-steel corrosion in 1.0 M HCl using electrochemical measurements and surface analysis methods. These methods indicated that the synthesized compounds have served as efficient mixed-type corrosion inhibitors and their adsorption on the steel surface obeyed isotherm model of Langmuir. Co-Sanp inhibitor displays the best corrosion inhibition efficiency, and the capacity is up to 97.11% at of 250 mg L −1 . Surface analysis confirms formation of protective layer on the C-steel surface.

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“…Among many works on the Schiff base complexes, recently various researches on the cadmium Schiff base complexes and their applications have been reported. Cadmium complexes have shown various properties such as luminescent potential, antimicrobial activity, anticancer, urease inhibitory activity, corrosion inhibitory effect, photocatalytic activity and etc. Accordingly synthesis of new cadmium Schiff base containing new ligand with different structure may be in demand yet.…”

Section: Introductionmentioning

confidence: 99%

Some novel hexa‐coordinated cadmium Schiff base complexes: X‐ray structure, Hirshfeld surface analysis, antimicrobial and thermal analysis

Mousavi

Montazerozohori

Naghiha

et al. 2020

Applied Organom Chemis

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A series of cadmium (II) complexes with the general formula of CdLX2, where X = Cl−, Br−, I−, SCN− and N3− and L is a tetradentate N4‐donor Schiff base ligand; were synthesized by a sonochemical process as a simple, cost effective and environmentally friendly method. The organic ligand was obtained by condensation reaction of triethylenetetraamine (trien) and cinnamaldehyde. The characterization of coordination compounds was carried out by FT‐IR, 1HNMR, 13CNMR, UV–visible spectroscopies and then conductivity measurements. The crystal structure of the cadmium azide complex was determined by single crystal X‐ray diffraction. This complex crystallizes in the monoclinic space group of C2/c. The cadmium ion is hexa‐coordinated by four nitrogen atoms from the tetradendate Schiff base ligand and two terminal azide nitrogen atoms. The crystal packing and Hirshfeld surface analysis of the CdL(N3)2 complex indicates the essential role of intermolecular interactions related to azido groups in the formation of supramolecular structure. The thermal behavior of complexes was studied by TG/DTG analysis. Moreover, an antibacterial bioassay of the cadmium complexes has been performed in vitro against two gram‐positive (Staphylococcus aureus and Bacillus subtilis) and two gram‐negative (Escherichia coli and Pseudomonas aeruginosa) bacterial strains. Furthermore antifungal activities of the compounds against two fungal strains of Aspergilus niger and Candida albicans were also investigated.

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Targeted synthesis of cadmium(ii) Schiff base complexes towards corrosion inhibition on mild steel

Abstract: Strategic synthesis of Cd(ii) Schiff base complexes with introduction of an azido ligand to achieve significant corrosion inhibition on mild steel.

Cited by 48 publications

References 78 publications

DGEBA‐polyaminoamide as effective anti‐corrosive material for 15CDV6 steel in NaCl medium: Computational and experimental studies

DGEBA‐polyaminoamide as effective anti‐corrosive material for 15CDV6 steel in NaCl medium: Computational and experimental studies

Sulfonated salicylidene thiadiazole complexes with Co (II) and Ni (II) ions as sustainable corrosion inhibitors and catalysts for cross coupling reaction

Some novel hexa‐coordinated cadmium Schiff base complexes: X‐ray structure, Hirshfeld surface analysis, antimicrobial and thermal analysis

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