Twisting (conformational changes)-based selective 2D chalcogeno podand fluorescent probes for Cr(Ⅲ) and Fe(Ⅱ)

摘要

The fluorenoazomethine containing chalcogeno podand fluorescent probes having N, O/S/Se coordinating donor unit show donor specific 'turn-on' recognition property towards metals (Cr(Ⅲ), Fe(Ⅱ) and Cu(Ⅱ)), where the fluorescence signals are controlled by the conformational change of the ligand framework on binding with the metal ion.