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    DFT Study Adsorption of Hydroxychloroquine for Treatment COVID-19 by SiC Nanotube and Al, Si Doping on Carbon Nanotube Surface: A Drug Delivery Simulation
    (Maik Nauka/Interperiodica/Springer, 2022) Al-Sawaff, Zaid H. H.; Dalgic, Serap Senturk; Kandemirli, Fatma; Monajjemi, Majid; Mollaamin, Fatemeh
    This study aims to investigate the capability of aluminum-doped nanotubes, silicon-doped nanotubes, and silicon carbide nanotubes to adsorb Hydroxychloroquine (C18H26ClN3O) molecular using DFT theory at 6-31G** basis set and M062x level of theory. The calculated results indicate that the distance between nanotubes and the drug from the N site is lower than from all other locations sites for all investigated nanotubes, and adsorption is more favorable, especially for Al-CNT nanotube. The adsorption energy, hardness, softness, and fermi energy results reveal that the interaction of Hydroxychloroquine with Al-CNT is stronger than Si-CNT and SiC-NT. The results clarify that Al-CNT is a promising adsorbent for this drug as Eads of Hydroxychloroquine/Al-CNT complexes are -45.07, -15.78, -45.15, -93.53 kcal/mol in the gas phase and -43.02, -14.43, -43.86, -88.97 kcal/mol for aqueous solution. The energy gap of the Hydroxychloroquine/Al-CNT system is in the range of 2.32 to 3.84 eV.