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Abraham, Christina Susan; Muthu, S.; Prasana, Johanan Christian; Armaković, Stevan; Armaković, Sanja J.; Rizwana B., Fathima; Geoffrey, Ben; David R., Host Antony
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 11/2019, Volume: 222Journal Article
2-N-(carboxymethyl)anilino acetic acid (PIDAA) molecule has been spectroscopically characterized and computationally investigated for its fundamental reactive properties by a combination of density functional theory (DFT) calculations, molecular dynamics (MD) simulations and molecular docking procedure. A comparison drawn between the simulated and experimentally attained spectra by FT-Raman and FT-IR showed concurrence. The natural bond orbital (NBO) analysis enabled in comprehending the stability and charge delocalization in the title molecule. The first hyperpolarizability which is an important parameter for future studies of nonlinear optics (NLO) was calculated to check the potential of the molecule to be an NLO material. Besides, frontier molecular orbitals (FMO), electron localization function (ELF) and localized orbital locator (LOL) analysis were performed. Energy gap (ΔE), electronegativity (χ), chemical potential (μ), global hardness (η), softness (S), Mulliken population analysis on atomic charges and thermodynamic properties of the title compound at different temperatures have been calculated. The local reactive properties of PIDAA have been addressed by MEP and ALIE surfaces, together with bond dissociation energy for hydrogen abstraction (H-BDE). MD simulations have been used in order to identify atoms with pronounced interactions with water molecules. The pharmaceutical potential of PIDAA has been considered by the analysis of drug likeness parameters and molecular docking procedure. The biological activity of the molecule in terms of molecular docking has been analyzed theoretically for the treatment of SARS and minimum binding energy calculated. The Ramachandran plot was used to check the stereochemistry of the protein structure. In addition, a comparison of the physiochemical parameters of PIDAA and commercially available drugs (Yu et al., 2004; Tan et al., 2004; Elshabrawy et al., 2014; Chu et al., 2004; Gopal Samy and Xavier, 2015) were carried out. Display omitted •CHELPG, NBO and NHO analyses of PIDAA were carried out.•NLO properties, local reactivity parameters (MEP and ALIE), electron localization function and localized orbital locator were analysed.•The bond dissociation energy for hydrogen abstraction (H-BDE) and interactions with water are accounted for.•The bond dissociation energy for hydrogen abstraction (H-BDE) and interactions with water are accounted for.•Suitable excipient substance to improve the properties was analyzed•Molecular docking of PIDAA with SARS protein 4APH.
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