▎ 摘　　要

NOVELTY - Graphene oxide induced europium(III) complex is claimed. The graphene oxide induced europium(III) complex exhibits infrared absorption peaks including 2980/cm, 2850/cm, 1612/cm, 1403/cm and 1087/cm; exhibits multi-layered six-petal flower morphology under the scanning electron microscope; and exhibits emission peaks at 579 nm, 591 nm, 614 nm, 652 nm and 702 nm correspond to europium(III) transitions of 5D0 to 7F0, 5D0 to 7F1, 5D0 to 7F2, 5D0 to 7F3 and 5D0 to 7F4, respectively under the excitation of 275nm wavelength, where 5D0 to 7F2 is strong emission band. USE - The graphene oxide-induced europium(III) complex is useful in preparing fluorescent materials including fluorescent anti-counterfeiting printing oil, fluorescent anti-counterfeiting paint or fluorescent anti-counterfeiting ink (claimed). ADVANTAGE - The graphene oxide-induced europium(III) complex: has petal-shaped micro-structure; can observe the unique six-petal multilayer three-dimensional microscopic morphology only under the microscope; can observe the microscopic morphology emitting red fluorescence under the fluorescence microscope; and makes high-grade anti-counterfeiting materials with not easy to forge. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene oxide induced europium(III) complex, comprising (1) mixing proportionally 1,2,3,4,5,6-hexakis(4-carboxyphenyl)benzene (H6CPB) and europium(III) nitrate hexahydrate (1a), adding it into mixed solution of water and dimethylformamide, adding acid to control the pH value, heating and stirring, and ultrasonically dispersing the mixture uniformly to prepare dimethylformamide dispersion of H6CPB and (1a), (ii) adding the dimethylformamide dispersion of H6CPB and (1a) into monolayer graphene oxide aqueous dispersion, and ultrasonically mixing uniformly to prepare graphene oxide induced mixed solution, and (iii) placing the graphene oxide induced mixed solution into an autoclave, carrying out solvothermal reaction, washing the product after the reaction, filtering, and drying to obtain a gray powdery product as final product.