Vibrational Features of Diphenylhydantoin

Abstract

"The molecular vibrations of diphenylhydantoin (DPH) were investigated in crystalline sample at room temperature, by using Fourier transform infrared (FT-IR), FT- and conventional Raman spectroscopies. Furthermore, density functional theory (DFT) calculations were utilized to confirm and clarify the experimental data. Two methods were evaluated for accurate prediction of the vibrational spectra: i) vibrational anharmonic calculations on DPH monomer based on the second-order perturbation theory; ii) harmonic calculations on a cluster of five DPH molecules. Keywords: Diphenylhydantoin, FT-IR, Raman, DFT, anharmonic, cluster model. "