Abstract
AbstractAn anthracene‐functionalised cyclam–copper(II) complex for the detection of HS– in aqueous environments has been prepared. This probe displays poor fluorescence but can selectively and sensitively detect HS– anions in water over other anions, biothiols and common oxidants such as H2O2 through remarkably enhanced emission. This turn‐on response in the presence of the HS– anion is ascribed to a demetallation reaction that inhibits emission quenching observed in the initial complex as a result of the presence of the paramagnetic Cu2+ centre. Moreover, real‐time fluorescence imaging measurements confirm that probe [Cu(1)]2+ can be easily used to detect intracellular HS– at micromolar concentrations with a remarkable enhancement in the FI/FI0 ratio.
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