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Abstract: Validation of reducing-difference procedure based on subtracting of non-polarized infrared (IR) spectra of n-component solid mixtures is presented. The accuracy and precision are established. The limits of detection are 3.0, 2.5, 1.5 and 1.0wt.% for 5-, 4-, 3-and 2-component mixtures, respectively. Smoothing procedures for IR spectral analysis, based on Savitzky–Golay or Fourier methods are applied as well. The mean values and relative standard deviations for peak position (ν i ) and integral absorbance (A i ) obtained by this data processing approach have been examined using Student''s t-test. [Copyright &y& Elsevier]

The article presents information on the structure of the organic compound S-Phenyl 4-cyanothiobenzoate or C14H9NOS. The molecules of this compound exhibit a chiral non-planar structure in which the 4-cyanophenyl and S-phenyl rings are tilted at dihedral angles of 1.81 (2) and 72.49 (1)° with respect to the central thiocarbonate unit. The compound crystallizes in the non-centrosymmetric monoclinic space group P21 and participates in very weak intermolecular hydrogen bonds and its observed structure is in good agreement with those determined for other S-phenyl thiobenzoates.

Recently liquid crystal doped with polymer is used to enhance physical and photo physical properties of these materials. The primary subject in the doped liquid crystal is the qualitative determination of the order parameter. Infrared spectroscopy has become the most informative tool in the study of conformation and orientational order of liquid crystalline materials. In the present paper, we used polarized Fourier transform infrared (FT-IR) spectroscopy to analyze the orientational ordering of the liquid crystal doped with polymer. We obtained information about the head orientational order of liquid crystal in these systems by observing the band corresponding to the vibrations of the relevant functional groups. [ABSTRACT FROM AUTHOR]