An Ultrastable Europium(III)–Organic Framework with the Capacity of Discriminating Fe²⁺/Fe³⁺ Ions in Various Solutions

Abstract

An ultrastable luminescent europium-organic framework, {[Eu(L)(H₂O)₂]·NMP·H₂O}_n (CTGU-2; NMP = N-methyl-2-pyrrolidone), can first detect Fe²⁺/Fe³⁺ cations in different medium systems with high selectivity and sensitivity, and it also exhibits high sensitivity for Cr₂O₇^2- anion and acetone with a wide linear range and a low detection limit.