Anthracene-linked calix[4]pyrroles: fluorescent chemosensors for anions

Abstract

Fluorescent anthracene–calix[4]pyrrole conjugates 2, 4 and 5 have been synthesized; these receptors can detect the presence of anions (e.g. F^–, Cl^–, H₂PO₄^–) by a significant quenching of their fluorescence.

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