Cover Feature: Analysis of Anion Binding Effects on the Sensitized Luminescence of Macrocyclic Europium(III) Complexes (Anal. Sens. 6/2022)

The cover feature image represents the differences in the luminescence response upon fluoride vs cyanide binding to a 1,4,7‐triazacyclonane‐based Eu(III) complex equipped with a carbostyril light‐harvesting antenna. The addition of excess of fluoride boosts the Eu(III) emission quantum yield by up to 6‐fold for such compounds. Cyanide addition extinguishes Eu(III) luminescence despite partial anion binding to a lanthanide 3+ ion. These compounds showed opposite responses upon fluoride and cyanide binding, and the results could facilitate the design of responsive probes for multiple anion types. More information can be found in the Research Article by K. E. Borbas and co‐workers.