Structural and vibrational studies on (E)-2-(2-hydroxy benzyliden amino)-3-phenyl propionic acid using experimental and DFT methods

Saleem H., ERDOĞDU Y., Subashchandrabose S., Thanikachalam V., Jayabharathi J., Babu N. R.

JOURNAL OF MOLECULAR STRUCTURE, cilt.1030, ss.157-167, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1030
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.molstruc.2012.04.011
  • Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.157-167
  • Anahtar Kelimeler: Phenylalanine, Salicylaldehyde, FT-IR, FT-Raman, TED, PROTON-TRANSFER, RAMAN-SPECTRA, HARTREE-FOCK, SCHIFF-BASES, FT-IR, FLUORESCENCE, DERIVATIVES, INHIBITORS, COMPLEXES, DESIGN
  • Gazi Üniversitesi Adresli: Hayır

Özet

The structural and spectroscopic properties of (E)-2-(2-hydroxy benzyliden amino)-3-phenyl propionic acid ((E)-2-HBAPPA) has been investigated by using theoretical and experimental methods. Using the computational studies the most stable conformer was identified. Density functional theory (DFT) calculations of 16 (E)-2-HBAPPA conformers have been performed to find the optimized structure and the computed vibrational wavenumbers of the most stable one. The FT Raman and FT-IR spectra of (E)-2-HBAPPA molecule have been recorded and analyzed. A detailed interpretation of the FT-IR, FT-Raman and harmonic wavenumbers obtained at B3LYP/6-311++G(d,p) level was reported. The vibrational assignments were studied using TED method. Intra-molecular charge transfer between nitrogen and hydroxyl hydrogen (C=N center dot center dot center dot H-O) has been studied. First order hyperpolarizability (beta(0)) has been calculated. Electronic excitation of (E)-2-HBAPPA was recorded in the visible region and compared with calculated ID-OFT results. (C) 2012 Elsevier B.V. All rights reserved.