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pH-Dependent Crystallization of 2-, 4-, 5-, and 6-Hydroxynicotinic Acids in Aqueous Media
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Orientador(es)
Resumo(s)
2-, 4-, 5-, and 6-hydroxynicotinic acids were crystallized in a pH-dependent manner using only water as the preferred solvent. The crystallization outcome was quite diverse: individual crystals of different sizes and shapes, microcrystalline powders, crystalline aggregates, and almost amorphous solids. Such a variety of solid forms demonstrates the relevance of pH control during crystallization processes.
Descrição
Funding Information: This research was funded by Fundação para a Ciência e a Tecnologia (FCT), Portugal (projects PTDC/QUIOUT/28401/2017, LISBOA-01-0145-FEDER-028401, UIDB/00100/2020, UIDP/00100/2020, and LA/P/0056/2020). Publisher Copyright: © 2023 by the authors.
Palavras-chave
2-, 4-, 5-, and 6-hydroxynicotinic acids crystallization pH control General Chemical Engineering General Materials Science Condensed Matter Physics Inorganic Chemistry