Estudo do efeito da solvatação aquosa sobre os parâmetros geométricos do ácido l-ascórbico usando a dinâmica molecular de car-parrinello

Abstract

Ascorbic acid is a substance that has major applications in biochemical systems, pharmacology, electrochemistry and food processing. In this work we present a study of the L-ascorbic acid structure by Car-Parrinello molecular dynamics simulation. Furthermore, we observed the solvation process of the molecule of this substance in an aqueous environment with the aid of this method. This was arranged in a box containing water molecules. The systems were conducted to a minimum energy employing the steepest descent algorithms for the subsystem electronic and ionic subsystem for Damp. The simulation was performed using the Verlet algorithm for both subsystems. The results showed that the ascorbic acid molecule has a structure consistent with the results found by other methods and that the molecule in aqueous environment, is quite soluble in the regions of the-OH groups, however, slightly soluble in other regions of the molecule.