Experimental study demonstrates stable 1:1 host-guest binding of a cationic water-soluble pillar[5]arene with sodium 1-octanesulfonate in water, suggesting utility in aqueous supramolecular systems.
By the introduction of trimethylammonium groups at both upper and lower rims, a cationic water-soluble pillar[5]arene was prepared, which forms a stable 1 : 1 host-guest complex with sodium 1-octanesulfonate in water.
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Ma et al. (2011) studied this question.
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