A theoretical investigation into the impact of solvents (alkanolic and non-alkanolic), structural and spectroscopic properties, donor-acceptor insights, Hirshfeld surface, and molecular docking of the anti-tumor compound (2E)-3-[4-(dimethylamino)phenyl]-1-(3-nitrophenyl)prop‑2-en-1-one A. Ram Kumar, S. Selvaraj, A.S. Vickram, M. Thirunavukkarasu, Mohammad Shahzad Samdani, Priya SD, Ranjith Balu Journal of Molecular Structure, 2025 • Theoretical spectroscopic properties of DMAPNP were analyzed. • Electronic properties and MEP in alkanolic/non-alkanolic solvents were studied. • NBO, Mulliken, and MEP confirmed the reactive sites of DMAPNP. • Hirshfeld analysis and 2D fingerprint plots revealed intermolecular interactions. • Molecular docking confirmed the anti-tumor potential of DMAPNP. In this study, computational methods were employed to analyze the molecular structure of (2E)-3-[4-(Dimethylamino)phenyl]-1-(3-nitrophenyl)prop-2-en-1-one (DMAPNP), investigating its structural and spectroscopic properties along with its biological activity. In particular, the Frontier Molecular Orbital (FMO) and Molecular Electrostatic Potential (MEP) surfaces in alkanolic solvents (ethanediol, ethanol, and methanol) and non-alkanolic solvents (DMSO, toluene, and water) were generated to analyze the solvent-solute interactions. The H → L transition shows low oscillator strengths (0.0002 in toluene to 0.0013 in ethanediol, DMSO, and water), indicating limited significance in the absorption spectrum. In contrast, the H → L +1 transition has much higher oscillator strengths, around 0.9412 for ethanediol and 0.9385 for DMSO and toluene, suggesting a greater likelihood of absorption at these wavelengths. The simulated vibrational wavenumbers revealed the presence of CH, NO 2 , CN, CC, CH 3 , and C=O groups in DMAPNP. The calculated chemical shifts confirmed the molecular structure of DMAPNP and aligned with standard values. In Hirshfeld surface analysis, the crystal packing of DMAPNP was primarily stabilized by H…H interactions, contributing 41.3%, followed by O…H / H…O interactions at 30.9%. In Natural Bond Orbital (NBO) analysis, the interaction between C 20 -H 38 and C 15 -H 33 shows a stabilization energy of 1102.89 kJ/mol, highlighting σ-σ* transitions. In contrast, the C 12 -C 16 and C 15 -H 33 interactions exhibit a stabilization energy of 2542.16 kJ/mol, indicating substantial π-σ* contributions. In the Mulliken charge distribution, the carbon atoms C 18 (-1.33704e) and C 13 (1.776064e), located in the para and meta positions concerning the nitro group (NO 2 ), exhibit the highest positive and negative potentials, respectively. Molecular docking assessed DMAPNP as a potential anti-tumor agent by inhibiting the key regulatory enzyme fructose-2,6-bisphosphatase, with a binding energy of -8.13 kcal/mol.
Experimental and theoretical investigations of prifinium bromide: structural insights, spectroscopic features, topological aspects, and biological properties S. Selvaraj, A. Ram Kumar, A. S. Vickram, G. P. Sheeja Mol, M. Thirunavukkarasu, Mohanraj Kumar International Journal of Applied Science and Engineering, 2025 Prifinium bromide (PB) was analyzed by experimentally and theoretically. The N3-C7 and C6-C7 bonds exceeded standard values due to hyperconjugation, and steric strain. A potential energy surface scan examined dihedral angles ϕ₁ (N3-C22-C23-H51) and ϕ₂ (C7-N3-C22-C23) to assess conformational stability. Vibrational spectra identified key stretching and deformation modes for C-N, C-H, C-C, CH₂, and CH₃ groups. Carbon and proton chemical shifts confirmed the molecular structure with strong correlation between experimental and theoretical values. Theoretical electronic spectra revealed six transitions (482–382 nm), with the most intense absorption at 473 nm (f = 0.0160) corresponding to the H-2 → L (99%) transition, along with the frontier molecular orbital (FMO) energy gap was 3.0501 eV. The most significant stabilization occurs during the π-π* transition from π(C20-C21) to π*(C16-C17) with an energy of 20.75 kJ/mol, while the quaternary nitrogen (-0.38751 e) accumulates electron density, and the bromine(-0.81746 e) exhibits strong electronegativity and electron withdrawing effects. PB did not meet Muegge’s rule, and its bioavailability score of 0.55 indicates moderate oral absorption, though poor solubility and low GI absorption may limit systemic exposure. Topological analyses were performed to highlight localized, delocalized, and weak interactions of PB. Molecular docking confirmed PB's anticholinergic potential, showing a binding affinity of -8.6 kcal/mol with the 5ZKC M2 muscarinic receptor.
Ultrasonic studies on non-aqueous solutions of toluene in carbon tetra chloride International Journal of Chemtech Research, 2012
Biological effect of melamine and its derivative contaminated food products Journal of Chemical and Pharmaceutical Research, 2011
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