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Abstract | Cited by

A crown ether-appended calix[2]triazolium[2]arene, which exhibits excellent selectivity for H2PO4− compared to other anions, has been designed and synthesized. The selectivity of the prepared receptor for H2PO4− is caused by the stabilization of H2PO4− by the neighboring triazolium hydrogen bond donors and crown ether hydrogen bond acceptors.

Graphical abstract: Crown ether-appended calix[2]triazolium[2]arene as a macrocyclic receptor for the recognition of the H2PO4− anion

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