Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1119, Issue -, Pages 462-471Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2016.05.001
Keywords
Organic crystal; Spectroscopic studies; Thermal studies; Antimicrobial evaluation; DFT studies
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The organic crystal 4-aminopyridinium 4-hydroxy benzoate hydrate was grown using slow evaporation method. Various characterization techniques such as single crystal X-ray diffraction, powder X-ray diffraction, FTIR, UV-visible-NIR spectroscopy and thermal analysis (TG-DSC) were employed to assay the structure and properties of the grown crystal. The antimicrobial evaluation of 4-aminopyridinium 4-hydroxy benzoate hydrate crystal was also performed against some bacteria and fungi. The minimum inhibitory concentration (MIC) values of 4-aminopyridinium 4-hydroxy benzoate hydrate were determined for bacterial and fungal strains. The assessment of optimized structure of the molecule and vibrational frequencies were done using DFT/B3LYP method with 6-31 G (d, p) basis set. The stability of the molecule, hyperconjugative interactions, delocalization of charges and intermolecular hydrogen bond were studied by applying natural bond orbital (NBO) analysis. TD-DFT method employing polarizable continuum model (PCM) was used to examine the electronic absorption spectrum. Evaluation of molecular electrostatic potential (MEP), Mulliken population charges and nonlinear optical (NLO) properties were also carried out. In addition, from the optimized geometry, frontier molecular orbitals analysis was executed. (C) 2016 Elsevier B.V. All rights reserved.
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