A FRET based colorimetric and fluorescence probe for selective detection of Bi3+ ion and live cell imaging

Abstract A Rhodamine B- quinoline conjugate ( RSQ ) functions as a colorimetric and fluorescence probe for selective recognition of Bi 3+ ion based on CHEF assisted FRET process. RSQ visibly changes its colour and fluorescence profile upon addition of Bi 3+ ion. The distinctive colour change allows facile discrimination of Bi 3+ over other common cations. Lowest concentration of Bi 3+ detected by RSQ is 0.05 μM. RSQ efficiently images intracellular Bi 3+ in live SiHa cells.