Highly sensitive and selective reversible sensor for the detection of Cr3+

A new fluorescent sensor capable of sensing Cr3+ has been synthesized. Complexing with Cr3+ triggers the formation of a highly fluorescent ring-open form which is pink in color. The sensor shows extremely high fluorescence enhancement upon complexation with Cr3+ and it can be used as a ‘naked eye’ sensor. Binding of Cr3+ was found to be reversible as the pink color disappears with excess EDTA.

A new fluorescent sensor based on thiophene-activated rhodamine B reversibly binds Cr3+ to form a highly fluorescent pink ring-open form.Figure optionsDownload as PowerPoint slide