FT-Raman, FT-IR spectral and DFT studies on (E)-1-4-nitrobenzylidenethiocarbonohydrazide

Thanikachalam V., Periyanayagasamy V., Jayabharathi J., Manikandan G., Saleem H., Subashchandrabose S., ...More

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, vol.87, pp.86-95, 2012 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 87
  • Publication Date: 2012
  • Doi Number: 10.1016/j.saa.2011.11.013
  • Journal Name: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.86-95
  • Keywords: (E)-1-4-Nitrobenzylidenethiocarbonohydrazide, Dipole-moment, First hyperpolarizability, Hatree Fock, Density functional theory, DENSITY-FUNCTIONAL THEORY, NORMAL-COORDINATE ANALYSIS, VIBRATIONAL-SPECTRA, MOLECULAR-STRUCTURE, AB-INITIO, SCALING FACTORS, HARTREE-FOCK, THIOSEMICARBAZONE, HYPERPOLARIZABILITIES, SEMICARBAZONE
  • Gazi University Affiliated: No

Abstract

Quantum mechanical calculation of optimized parameters, vibrational wavenumbers and energies of (E)-1-4-nitrobenzylidenethiocarbonohydrazide ((E)-1-4-NBTCH) was carried out using Hatree Fock (HF) with 6-31G(d,p), 6-311G(d,p) basis sets and density functional theory (DM with 6-31G(d,p) basis set. The optimized geometrical parameters obtained by HF and DFT are in better agreement with analogues single XRD data. The vibrational wavenumbers were calculated and the complete assignments were performed on the basis of total energy distribution (TED), calculated with scaled quantum mechanical (SQM) method. The electrical dipole moment (mu) and first hyperpolarizability (beta(0)) values have been computed using ab initio and DFT quantum mechanical calculation. The calculated results (beta(0)) show that the title molecule might have nonlinear optical (NLO) behaviour. The total energy, dipole moment and rotational constant are reported for the title molecule. The HOMO-LUMO energies were calculated and natural bonding orbital (NBO) analysis has also been carried out. (C) 2011 Elsevier B.V. All rights reserved.