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- W2888687158 abstract "Although alkali halide salts play key roles in all living systems, the physical models used to describe the properties of aqueous solutions of salts do not take into account specific ion–ion interactions. To identify specific ion–ion interactions possibly contributing to the aggregation of proteins, we have used dynamic light scattering (DLS) to probe the aggregation of charged cavitands. DLS measurements of negatively charged 1 in the presence of a range of alkali metal halides reveal no significant aggregation of host 1 as a function of the nature of the cation of the added salt. Only at high concentrations could trace amounts of aggregation be detected by 1 H NMR spectroscopy. Contrarily, 1 was readily aggregated and precipitated by ZnCl 2 . In contrast, although fluoride and chloride did not induce aggregation of positively charged host 2 , this cavitand exhibited marked aggregation as a function of bromide and iodide concentration. Specifically, bromide induced small but significant amounts of dimerization, whilst iodide induced extreme aggregation. Moreover, in these cases aggregation of host 2 also exhibited a cationic dependence, with an observed trend Na + > Li + > K + ≈ Cs + . In combination, these results reveal new details of specific ion pairings in aqueous solution and how this can influence the properties of dissolved organics." @default.
- W2888687158 created "2018-08-31" @default.
- W2888687158 creator A5002305411 @default.
- W2888687158 creator A5012045768 @default.
- W2888687158 date "2018-08-23" @default.
- W2888687158 modified "2023-09-30" @default.
- W2888687158 title "Dynamic light scattering studies of the effects of salts on the diffusivity of cationic and anionic cavitands" @default.
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- W2888687158 doi "https://doi.org/10.3762/bjoc.14.195" @default.
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