A new turn on coumarin-based fluorescence probe for Ga3 + detection in aqueous solution

The probe CT was synthesized and investigated as a novel label-free chemosensor for Ga 3   + detection in water. Probe CT showed remarkable selectivity and sensitivity for Ga 3   + in Tris–HCl aqueous buffer solution (pH   7.0). The chemosensor responded rapidly to Ga 3   + with a 1:1 stoichiometry . Meanwhile, the unapparent changes of fluorescence lifetime decays suggest the turn-on process of probe CT by Ga 3   + which appears to be a static mechanism.