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Selective recognition and extraction of arsenate by a urea-functionalized tripodal receptor from competitive aqueous media. 2022
Sandeep Kumar Dey, and
Beatriz Gil-Hernández, and
Vivekanand V Gobre, and
Dennis Woschko, and
Sarvesh S Harmalkar, and
Firdaus Rahaman Gayen, and
Biswajit Saha, and
Rajib Lochan Goswamee, and
Christoph Janiak
Materials Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam, 785006, India. sandeep@neist.res.in.
A second-generation hydrogen bond donor (HBD) anion receptor with an inner amide cavity and an outer urea cavity can selectively and efficiently extract arsenate (AsO43-) from water in the presence of competitive oxoanions and halides. The X-ray structure showed encapsulation of AsO43- in a π-stacked dimeric capsular assembly of the receptor, the first crystallography-based example of pentavalent AsO43- trianion recognition by a HBD receptor.
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