A Guanidinium Modified Rhodamine-Based Fluorescent Probe for in Vitro/Vivo Imaging of Gold Ions

Abstract

We devised a rhodamine-based fluorescent probe functionalized with a guanidinium moiety, which both operates efficiently in pure aqueous media and displays a selective fluorescence response to Au3+ ions. We also demonstrated the successful fluorescence imaging of Au3+ within living cells and a vertebrate species, the zebrafish.