Research of fluorescent compounds used as fluorescence probe in surfactant field are becoming important because they have sensitive fluorescent signals and can be conveniently detected.But their poor water-solubility usually limits their application.To improve water-solubility of the surfactant as a tracer used in oil recovery and obtain appropriate fluorescent probe,two fluorescent non-ionic surfactants Ⅲ_a and Ⅲ_b were designed and synthesized from naphthalimide and polyoxyethylene dodecyl ether with amid...