Chemically Fueled Autonomous SolâGelâSolâGelâSol Transitions.
Angew Chem Int Ed Engl
; 62(23): e202301529, 2023 Jun 05.
Article
em En
| MEDLINE
| ID: mdl-37015046
ABSTRACT
Complex non-equilibrium phase behaviors are a hallmark of natural self-assembling systems. Here we show how intricate phase transitions can be achieved through a chemically fueled reaction cycle to yield autonomous solâgelâsolâgelâsol transitions. A relay of chemical transformations based on thiazinane metathesis leads to two consecutive transient gelations in a closed system. Within seconds of fuel addition to deactivated thiazinane monomers, an imine-based hydrogel forms that consists of fibrillar microspheres. This gel quickly loses its mechanical strength and forms a solution, from which a second aldehyde-based gel nucleates and remains stable for over one day. Overall, our reaction cycle gives rise to two consecutive re-entrant phase transitions without any experimental intervention.
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MEDLINE
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En
Ano de publicação:
2023
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Article