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How sulfur oxidation states shape the behavior of sugar-based surfactant molecules

phys.org·Saitama University·about 1 month ago
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Carbohydrate Research (2026). DOI: 10.1016/j.carres.2026.109943"> Graphical abstract. Credit: Carbohydrate Research (2026). DOI: 10.1016/j.carres.2026.109943 Sugar-based amphiphilic molecules, which contain a hydrophilic sugar headgroup and a hydrophobic segment such as an alkyl chain, can assemble in water depending on their concentration, forming hydrophobic microenvironments or organizing at interfaces. These properties are important fundamental phenomena related to detergents, emulsifiers, molecular assemblies, and the dispersion and delivery of drugs and functional molecules. However, how subtle changes in molecular structure affect aggregation and interfacial behavior remains incompletely understood. In particular, the sulfur atom linking a sugar unit to a hydrophobic chain can be oxidized from sulfide to sulfoxide and sulfone, allowing its electronic and chemical properties to be tuned while largely preserving the overall molecular framework.…

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