▎ 摘　　要

A water-soluble Eu(III) hybrid composite based-on DPA and Phen as ligands, graphene oxide sheets (GOSs) as inorganic matrix, and Eu3+ as luminescence center has been synthesized, namely, Eu-DPA-Phen/GOSs. Compared with single Eu(III) complexes named Eu-DPA-Phen, Eu-DPA-Phen/GOSs not only retains the high luminescence intensity but also shows better solubility, higher stability, and longer fluorescence lifetime. It can be used as a fluorescent probe to detect Cu2+ ions in liquid medium and mixed with polyvinyl alcohol (PVA) to produce a self-supporting film with high luminescence intensity, good stability, mechanical properties. This film is also sensitive to Cu2+ ions and convenient to carry. Thus, it has a great potential in the field of flexible and foldable luminescent devices and fluorescence sensing.