Panneerselvi, V and PRABAKARAN, K (2023) A Facile One Pot Synthesis and Anticorrosion Potential of Carbazole Linked Quinoline Moiety. A Facile One Pot Synthesis and Anticorrosion Potential of Carbazole Linked Quinoline Moiety, 36 (1). pp. 229-238. ISSN 0970-7077

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Abstract

A facile and efficient one pot synthesis has been developed for the preparation of quinoline-substituted carbazoles 3-(4-carboxyquinolin
2-yl)-9-methyl-9H-carbazole (Cbz-QCA) and 3-(4-chloroquinolin-2-yl)-9-methyl-9H-carbazole (Cbz-ClQ) by treating 3-acetyl-9-methyl
9H-carbazole (3Ac-Cbz), with isatin under Pfitzinger reaction conditions and utilizing anthranilic acid in the presence of POCl3 through
the modified Niementowski method, respectively. The synthesized compounds have been comprehensively characterized through spectral
data. The effect of 3Ac-Cbz (1), Cbz-QCA (2) and Cbz-ClQ (3) were assessed as a steel corrosion inhibitor in 1M HCl using weight loss,
potentiodynamic polarization and electrochemical methods. The inhibitory effect increases with the synthesized inhibitor concentration,
reaching above 84% at higher concentrations of all tested inhibitors. These results indicated that synthesized inhibitors have a good
corrosion inhibition. An increase in the concentration of inhibitor leads to a higher percentage of inhibition efficiency, driven by the adsorption
of inhibitor molecules onto the metal surface. The scanning electron microscope (SEM) images confirmed the successful outcomes of the
experimental inhibitory tests and validate the adsorption process.

Item Type: Article
Uncontrolled Keywords: Carbazole derivatives, Quinoline derivatives, Pfitzinger reaction, Niementowski reaction, Electrochemical corrosion.
Divisions: PSG College of Arts and Science > Department of Chemistry
Depositing User: Dr. B Sivakumar
Date Deposited: 27 Oct 2025 05:48
Last Modified: 27 Oct 2025 05:48
URI: https://ir.psgcas.ac.in/id/eprint/2461

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