Minimalistic ice recrystallisation inhibitors based on phenylalanine
Ice recrystallisation inhibition (IRI) is typically associated with ice binding proteins, but polymers and other mimetics are emerging. Here we identify phenylalanine as a minimalistic, yet potent, small-molecule IRI capable of inhibiting ice growth at just 1 mg mL −1 . Facial amphiphilicity is show...
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Veröffentlicht in: | Chemical communications (Cambridge, England) England), 2022-07, Vol.58 (55), p.7658-7661 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Ice recrystallisation inhibition (IRI) is typically associated with ice binding proteins, but polymers and other mimetics are emerging. Here we identify phenylalanine as a minimalistic, yet potent, small-molecule IRI capable of inhibiting ice growth at just 1 mg mL
−1
. Facial amphiphilicity is shown to be a crucial structural feature, with
para
-substituents enhancing (hydrophobic) or decreasing (hydrophilic) IRI activity. Both amino and acid groups were found to be essential. Solution-phase self-assembly of Phenylalanine was not observed, but the role of self-assembly at the ice/water interface could not be ruled out as a contributing factor.
Phenylalanine is demonstrated to inhibit ice recrystallisation at low mM concentrations. Sequential modifications demonstrate the importance of amphiphilicity on activity. |
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ISSN: | 1359-7345 1364-548X 1364-548X |
DOI: | 10.1039/d2cc02531k |