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A bile acid based anion-receptor has been synthesized which forms a stable gel in CHCl 3 –DMSO cosolvent in the presence of HSO4- ion. The anion-selective gel formation can be used for the recognition of HSO4- ion. An analogous receptor with pyridine moiety has also been synthesized which shows higher selectivity and binding affinity for HSO4- ion but does not exhibit the gelation behaviour.
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