Pyrazinamide-Pimelic Acid Cocrystals: A Mechanochemical and Thermal Study

  • Cocrystals represent a promising class of crystalline materials, offering a wide potential for physico-chemical property alteration of chemical compounds, such as their solubility, by cocrystallizing the targeted compound with another solid material. In the present study, we investigated the cocrystal system between the anti-tuberculosis drug pyrazinamide (PZA) and pimelic acid (PA) by thermal characterization and milling conditions of mechanochemical synthesis. Thermal treatment resulted in the formation of a eutectic between the compounds PZA and PA. Furthermore, irreversible separation of the cocrystal occurred upon melting. This finding indicated low stability of the cocrystal and the necessity of mechanochemical synthesis for cocrystal formation. The mechanochemical synthesis parameters were elucidated by investigating the temperature effect while milling and the role of pre-milling the coformer PA using in-situ monitoring techniques. The polymorphism of PA, influenced byCocrystals represent a promising class of crystalline materials, offering a wide potential for physico-chemical property alteration of chemical compounds, such as their solubility, by cocrystallizing the targeted compound with another solid material. In the present study, we investigated the cocrystal system between the anti-tuberculosis drug pyrazinamide (PZA) and pimelic acid (PA) by thermal characterization and milling conditions of mechanochemical synthesis. Thermal treatment resulted in the formation of a eutectic between the compounds PZA and PA. Furthermore, irreversible separation of the cocrystal occurred upon melting. This finding indicated low stability of the cocrystal and the necessity of mechanochemical synthesis for cocrystal formation. The mechanochemical synthesis parameters were elucidated by investigating the temperature effect while milling and the role of pre-milling the coformer PA using in-situ monitoring techniques. The polymorphism of PA, influenced by temperature and pre-milling, exhibited a substantial impact on the kinetics of cocrystallization. This finding underscores the significance of coformer polymorphism as an additional factor in mechanochemical cocrystallization reactions.zeige mehrzeige weniger

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Autor*innen:Anastasia MayORCiD
Koautor*innen:Franziska EmmerlingORCiD, Lucia CasaliORCiD, Inês FelicianoORCiD, Carlos Bernardes
Dokumenttyp:Posterpräsentation
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2025
Organisationseinheit der BAM:6 Materialchemie
6 Materialchemie / 6.3 Strukturanalytik
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:Cocrystal
Themenfelder/Aktivitätsfelder der BAM:Material
Material / Materialdesign
Veranstaltung:11th International Conference on Mechanochemistry and Mechanical Alloying
Veranstaltungsort:Berlin, Germany
Beginndatum der Veranstaltung:14.09.2025
Enddatum der Veranstaltung:18.09.2025
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:14.01.2026
Referierte Publikation:Nein
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