Estudo espectroscópico dos ácidos, mirístico e láurico

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 myristic acid (tetradecanoic) and lauric (dodecanoic) as C under ambient conditions of temperature and pressure. Experiments were performed in X-ray diffraction that enabled the identification of polymorphic phases (Form C). Then they were performed Raman spectroscopy experiments. The vibrational spectra of myristic acid were obtained crystal in the spectral region between 100 and 3100 cm-1 while the lauric acid crystal spectra were measured from 30 cm-1 to 3100 cm-1. All bands were correlated and assigned to data published in the literature from very similar organic systems, such as stearic and oleic acids and some amino acids.