Influence of Macrocyclic Ring Size on the Corrosion Inhibition Efficiency of Dibenzo Crown Ether: A Density Functional Study

Saprizal Hadisaputra(1*), Saprini Hamdiani(2), Muhammad Arsyik Kurniawan(3), Nuryono Nuryono(4)

(1) Department of Chemistry Education, Faculty of Science and Education, University of Mataram, Jalan Majapahit No 62, Mataram, 83125, Indonesia
(2) Department of Chemistry Education, Faculty of Science and Education, University of Mataram, Jalan Majapahit No 62, Mataram, 83125, Indonesia
(3) Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Islam Indonesia. Jalan Kaliurang KM 14,5 Yogyakarta 55584
(4) Department of Chemistry, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(*) Corresponding Author


The effect of macrocycle ring size on the corrosion inhibition efficiency of dibenzo-12-crown-4 (DB12C4), dibenzo-15-crown-5 (DB15C5), dibenzo-18-crown-6 (DB18C6), dibenzo-21-crown-7 (DB21C7) and dibenzo-24-crown-8 (DB24C8) have been elucidated by mean of density functional calculation at B3LYP/6-31G(d) level of theory in the gas and aqueous environment. The quantum chemical parameters including the frontier orbital energies (EHOMO, ELUMO), ionization potential (I), electron affinity (A), the absolute electronegativity (χ), hardness (η), softness (σ), and the fraction of electron transferred (ΔN) are positively correlated to the corrosion inhibition efficiency (IE%) of the studied crown ethers. The calculation results indicate that DB24C8 exhibits the highest corrosion inhibition efficiency, whereas DB12C4 exhibits the lowest corrosion inhibition efficiency. The results of this study will contribute to design crown ethers potential as corrosion inhibitors.


crown ether; corrosion inhibition; ring size; DFT method

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