Polymorphism in propyl gallate recrystallized with acetone

Autor(es)

Galico, D. A. ; Nova, C. V. ; Bannach, G.

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 128, n. 1, p. 611-614, APR 2017.
• Citações Web of Science: 1

Resumo

A new polymorphic form of the synthetic antioxidant propyl gallate was obtained by the recrystallization of the compound in acetone. The new form was characterized by thermogravimetry, differential scanning calorimetry, X-ray powder diffractometry, and near- and middle-infrared region spectroscopy. While the commercial form of propyl gallate starts to melt at 145 A degrees C with the maximum temperature of the peak at 150 A degrees C, the recrystallized form starts to melt at 140 A degrees C with the maximum temperature of the peak at 148.8 A degrees C. The two forms differ much in the X-ray powder diffractograms pattern, confirming the change in the long-distance interactions in both forms but the near- and middle-infrared region spectroscopy shows that no difference occurs in the inter- and intramolecular interactions. (AU)

• Processo FAPESP: 12/21450-1 - Estudos termoanalíticos, síntese e caracterização dos co-cristais sólidos de cetoprofeno com alguns co-formadores
• Beneficiário: Gilbert Bannach
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/09022-7 - Estudos termoanalíticos, síntese e caracterização dos co-cristais sólidos de alguns antibióticos (fluoroquinolonas) com alguns co-formadores
• Beneficiário: Massao Ionashiro
• Modalidade de apoio: Auxílio à Pesquisa - Regular