Estudo da fotodimerização de chalconas no estado sólido cristalino

Abstract

This work insert in a research line that to aim for at establish parameters that delineate the photodimerizations in the crystalline solid state of chalcones fluorinated. For this, the characterization of the monomers was made by ray-X diffraction and NMR. After irradiation in U.V. of the solid samples, it was obtained the dimers that were analyzed by NMR and the results compared with the literature, being certain incoherence. So that the crystallography results and the data of NMR represented the reality of the system tried to eliminate interferences provoked by irradiation of a same compound recrystallized in different solvents. We opted to do the irradiation in U.V. of single-crystal of the samples 2,6-difluor-4'-metoxychalcone and 3,5-difluor-4'-metoxychalcone (26F4'MOCH and 35F4'MOCH respectively). Such molecules were chosen among the others for they possess arrangements similar crystallografic. With this, we propose a methodology of recrystallization of the most select samples and a more discerning analysis of the results.