Caracterização espectroscopia dos cristais de ácido palmítica nas formas B e C

Abstract

Fatty acids are organic molecules vastly different properties, which allows for a broad range of applications, such as in the fields of chemical industry biofuels, biolubricants, cosmetics, pharmaceuticals, medical products and food industry. Therefore, the scientific community has turned its attention over the years in seeking to understand its physical and chemical properties. This work is devoted to the study of the vibrational properties of the crystals Palmitic acid the forms B and C, both monoclinic under ambient conditions of temperature and pressure. Experiments were performed in X-ray diffraction that enabled the identification of polymorphic phases (Form B and C). Then they were performed Raman spectroscopy experiments. The vibrational spectra of palmitic acid were obtained crystal in the spectral region between 20 and 3100 cm-1. All bands were correlated and designated with published data from similar organic systems, as amino acids, and other fatty acids with very similar molecular structure.