Document Type: Original Article

Authors

1 Department of Biochemistry and Molecular Biology, University of Chittagong, Chittagong,Hathazari-4334, Bangladesh

2 Chemistry, European University of Bangladesh, Dhaka, Bangladesh

3 Department of Physics, European University of Bangladesh, Dhaka-1216, Bangladesh

10.33945/SAMI/IJABBR.2020.2.2

Abstract

The morpholinium cation based ionic liquids are designed to evaluate the thermophysical, chemical reactivity, and biological activity. To estimate and design the bioactive ILs, propionate and trihalopropanoate were considered under theoretical study by Density Functional Theory (DFT). To make effect of halogens atom on anion, propionate, trifluro propionate, trichloro propionate, and tribromo propionate were taken for optimization. Some thermodynamic and thermophysical properties such as free energy, entropy, dipole moment, binding energy, nuclear energy, electronics energy, and heat of formation were calculated using DFT method and make a comparative effect for halogen atoms activity on anion. The free energy, binding energy, and heat of formation were the highest on morphonium trifluro propionate (IL02) and the second is on tribromo propionate (IL04). Quantitative Structure Activity Relationship (QSAR) like charge density, surface area grid, volume, LogP, polarizability, refractivity, and molecular mass were simulated and recorded, from which the biological activity was calculated. The chemical reactivity like HOMO, LUMO, HOMO-LUMO gap, ionization potential, hardness, softness electronegativity and electron affinity were calculated. The vibrational spectroscopy and UV spectroscopy data provide them the identification and characterization. To sum up, the thermophysical properties are highly affected by trifluro propionate anion then tribromo propionate, trichloro propionate, and propionate respectively. On the other hand, the chemical reactivity increases in order IL04, IL03, IL02, IL01 but biological activity is inversely changed.

Keywords

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