Chemistry Letters, Vol.41, No.12, 1600-1602, 2012
A Simple Rhodamine-based Naked-eye and Fluorescence "Off-On" Sensor for Cu(II) in Aqueous Solution
A new rhodamine-6G-based sensor is designed and synthesized. Its absorbance and fluorescence sensing behavior toward metal ions is investigated in mixed aqueous media (CH3OH/H2O, 6:4, v/v, pH 7.1). It displays selective Cu2+-induced spirolactam ring opening of the rhodamine dye in the presence of other heavy and transition-metal (HTM) ions.