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White, Lisa J; Boles, Jessica E; Allen, Nyasha; Alesbrook, Luke S; Sutton, J. Mark; Hind, Charlotte K; Hilton, Kira L. F; Blackholly, L. R; Ellaby, Rebecca J; Williams, George T; Mulvihill, Daniel P; Hiscock, Jennifer R
Journal of materials chemistry. B, 06/2020, Letnik: 8, Številka: 21Journal Article
SSAs are a class of supramolecular self-associating amphiphilic salt, the anionic component of which contains a covalently bound hydrogen bond donor-acceptor motif. This results in a monomeric unit which can adopt multiple hydrogen bonding modes simultaneously. Previous investigations have shown examples of SSAs to act as antimicrobial agents against clinically relevant methicillin-resistant Staphylococcus aureus (MRSA). Herein, we report an intrinsically fluorescent SSA which can self-associate producing dimers, spherical aggregates and hydrogels dependent on solvent environment, while retaining antimicrobial activity against both model Gram-positive (MRSA) and Gram-negative ( Escherichia coli ) bacteria. Finally, we demonstrate the SSA supramolecular hydrogel to tolerate the inclusion of the antibiotic ampicillin, leading to the enhanced inhibition of growth with both model bacteria, and derive initial molecular structure-physicochemical property-antimicrobial activity relationships. Solution dependent self-association leads to the production of tuneable hydrogels and spherical aggregates with antimicrobial activity against MRSA and E. coli .
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in: SICRIS
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