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Updated: Dec 27, 2025

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Published on: July 13, 2018
Selective and efficient removal of perrhenate by an imidazolium based hexapodal receptor in water medium
Rajib Ghosh1, Tamal Kanti Ghosh1, Pradyut Ghosh1
1School of Chemical Science, Indian Association for the Cultivation of Science, 2A & 2B, Raja S. C. Mullick Road, Kolkata - 700032, India. icpg@iacs.res.in.
Abstract:
This work reports a new cationic imidazolium based hexapodal receptor, [L.6Br], for selective and efficient removal of perrhenate (ReO4-) as [L.6ReO4] from 100% aqueous medium via extraction through precipitation. Selective removal of ReO4- even in the presence of common anions such as halides and oxyanions in excess within a wide range of pH values from 1 to 14 by this receptor is also demonstrated. Importantly, [L.6Br] could easily be recovered upon heating [L.6ReO4] with tetrabutylammonium bromide (TBABr) in acetonitrile at 60 °C and recycled as a fresh extractant for ReO4-.
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