For instance, ionic and hydrophobic attractive interactions stabilize pearls or rings -on-a-string conformations, possibly a model for the formation of the chromatin assembly. The attractive interactions due to hydrophobic fatty acid groups attached to polysaccharides promote the formation of vesicles that entrap and slowly release water-soluble drugs. Intra- and intermolecular associations based on ion-pairing mixed interactions also control the formation of host-guest compounds, protein conformation, and the assembly of layered polyelectrolytes.
Ionic Interactions in Natural and Synthetic Macromolecules
Metallo-supramolecular polymers and networks are formed due to the coordination of multivalent cations with bi- and trifunctional organic ligands. The association of lithium salts to polymers in the absence of water allows the formation of highly efficient energy sources.
In aqueous solutions, the role of water-mediated indirect ion—macromolecule interactions will be discussed. The addition of organic solvents to aqueous solutions significantly changes the ion specificities due to the formation of water—organic solvent complexes.
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For direct ion—macromolecule interactions, we will discuss specific ion-pairing interactions for charged macromolecules and specific ion—neutral site interactions for uncharged macromolecules. When the medium conditions change from dilute solutions to crowded environments, the ion specificities can be modified by either the volume exclusion effect, the variation of dielectric constant, or the interactions between ions, macromolecules, and crowding agents.
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Salt bridge (protein and supramolecular) - Wikipedia
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Salt bridge (protein and supramolecular)
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