Pd-catalyzed reactions such as the Buchwald-Hartwig, Heck, Sonogashira, Suzuki-Miyaura reactions represent powerful transformations for the synthesis of complex molecules[1].Even after purification, a high level of residual Pd2+ is often found m the resultant product, which thus makes Pd2+ detection attract tremendous attention[2].Since Pd2+ is a strong fluorescence quencher, design of fluorescence-enhanced chemosensor for Pd2+ is still a challenge.