The Origin of Delayed Polymorphism in Molecular Crystals Under Mechanochemical Conditions

Abstract: We show that mechanochemically driven polymorphic transformations can require extremely long induction periods, which can be tuned from hours to days by changing ball milling energy. The robust design and interpretation of ball milling experiments must account for this unexpected kinetics that arises from energetic phenomena unique to the solid state. Detailed thermal analysis, combined with DFT simulations, indicates that these marked induction periods are associated with processes of mechanical activation. Correspondingly, we show that the pre‐activation of reagents can also lead to marked changes in the length of induction periods. Our findings demonstrate a new dimension for exerting control over polymorphic transformations in organic crystals. We expect mechanical activation to have a much broader implication across organic solid‐state mechanochemistry.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
The Origin of Delayed Polymorphism in Molecular Crystals Under Mechanochemical Conditions ; day:08 ; month:11 ; year:2023 ; extent:7
Chemistry - a European journal ; (08.11.2023) (gesamt 7)

Urheber
Linberg, Kevin
Szymoniak, Paulina
Schönhals, Andreas
Emmerling, Franziska
Michalchuk, Adam

DOI
10.1002/chem.202302150
URN
urn:nbn:de:101:1-2023110914132791447991
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
14.08.2025, 11:02 MESZ

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