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Detailed molecular structure (XRD), conformational search, spectroscopic characterization (IR, Raman, UV, fluorescence), quantum mechanical properties and bioactivity prediction of a pyrrole analogue.

Authors
  • Srikanth, Katta Eswar1
  • Veeraiah, A1
  • Pooventhiran, T2
  • Thomas, Renjith2
  • Solomon, K Anand3
  • Soma Raju, Ch J1
  • Latha, J Naveena Lavanya4
  • 1 Molecular Spectroscopy Laboratory, Department of Physics, D.N.R.College (A), Bhimavaram, A.P., 534202, India. , (India)
  • 2 Department of Chemistry, St Berchmans College (Autonomous), Changanassery, Kerala, India. , (India)
  • 3 Department of Chemistry, School of Engineering, Dayananda Sagar University, Bangalore, India. , (India)
  • 4 Department of Biosciences and Biotechnology, Krishna University, Machilipatnam, A.P., India. , (India)
Type
Published Article
Journal
Heliyon
Publisher
Elsevier
Publication Date
Jun 01, 2020
Volume
6
Issue
6
Identifiers
DOI: 10.1016/j.heliyon.2020.e04106
PMID: 32529077
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Pyrroles are an exciting class of organic compounds with immense medicinal activities. This manuscript presents the structural and quantum mechanical studies of 1-(2-aminophenyl) pyrrole using X-Ray diffraction and various spectroscopic methods like Infra-Red, Raman, Ultra-violet and Fluorescence spectroscopy and its comparison with theoretical simulations. The single-crystal X-ray diffraction values and optimized geometry parameters also were within the agreeable range. A fully relaxed potential energy scan revealed the stability of the possible conformers of this molecule. We present the density functional theory results and assignment of the vibrational modes in the infrared spectrum. The experimental and scaled simulated vibrations matched when density functional theory simulations (B3LYP functional with 6-311++G∗∗). The electronic spectrum was simulated using time-dependent density functional theory with CAM-B3LYP functional in dimethylsulphoxide solvent. The fluorescence spectrum of the compound was studied at different excitation wavelengths in the dimethylsulphoxide solvent. The stability of the molecule by intramolecular electron transfer by hyperconjugation was studied with the natural bond orbital analysis. Frontier molecular orbitals and molecular electrostatic potentials of the compound gave an idea about the reactive behaviour of the compounds. Prediction of activity spectral studies followed by docking analysis indicated that the molecule is active against arylacetonitrilase inhibitor. © 2020 Published by Elsevier Ltd.

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