A water soluble turn-on fluorescent probe for the detection of mercury ions in purely aqueous media a has been developed by appending a water-compatible PEG-unit onto a rhodamine derivative. It has high selectivity for Hg2+ ions and is fairly non-toxic in intercellular studies.
Based on the principle of fluorescence recovery, we propose a simple label-free and turn-on method for the detection of I− ions with high selectivity and sensitivity by using fluorescent Cdots/Ag nanocomposites in aqueous media.
Quinoline Schiff base L exhibits a more than 38-fold fluorescence enhancement after addition of Al3+ ions at an excitation wavelength of 373 nm, and shows a high selectivity for Al3+ over other metal ions.