A layered coordination polymer, [Ce(L)(H₂O)₄]_n (1), was synthesized by hydrothermal method by the reaction of 5⁃sulfoisophthalic acid monosodium salt (NaH₂L) with cerium nitrate hexahydrate. Its molecular structure and composition were measured by single crystal diffraction, elemental analysis and thermogravimetry. Each Ce³⁺ was nine coordinated with the coordination geometry of three⁃capped triangular prism. The central Ce³⁺ could be bridged by the carboxylate and sulfonate groups of the L^3- ligands, forming a two⁃dimensional layered structure. The interlayers were connected by the hydrogen bonds between the coordination water molecules and oxygen atoms of functional groups, increasing the stability of the structure. The fluorescence measurement results show that compound 1 exhibits the characteristic fluorescence emission peak of the ligand at 427 nm. It also has the second⁃order nonlinear optical property, and its intensity is 0.7 times of that of potassium dihydrogen phosphate (KDP).

With the development of science and technology, more and more materials are coming out, at the same time,the demand for materials is increasing. Rare earth luminescent nanomaterials are different from conventional ones. They have the advantages of good physical and chemical stability, high temperature resistance, narrow luminescence band and high color purity which makes they show good prospect of applications in so many fields, such as light emitting devices, imaging and medicine and have become one of the hot spots. In this paper, the preparation and application of rare earth luminescent nanomaterials are reviewed, and the problems that need to be solved and the development prospects are discussed.