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Infrared spectroscopy and the characterization of terfenadine crystallized from...
Leitão, M.; Canotilho, J.; Sousa, A.; Pais, A.; Sousa, A.; Redinha, J. SimõesAbstract In this paper the structural characterization of terfenadine crystallized from ethanol-water, ethanol and methanol is performed by infrared spectroscopy. The OH stretching vibration, composed of three markedly overlapped bands, is analyzed by peak fitting. The assignment of the hydrogen bonds was conducted making use of band parameters, spectroscopic data for CCl4 solutions, and molecular dynamics cal...
Study of Polymorphism From DSC Melting Curves; Polymorphs of Terfenadine
Leitão, M.; Canotilho, J.; Cruz, M.; Pereira, J.; Sousa, A.; Redinha, J.Abstract Terfenadine samples prepared by crystallization in different media and supersaturation conditions were used to investigate the polymorphism of the substance. The study was based on DSC melting curves. An empirical parametric equation was used for modelling the experimental data. The signal recorded was resolved into the corresponding overlapping peak components by fitting analysis. Four polymorphic ph...
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