The self-assembly of nanoparticles in solution is controlled by a variety of weak interactions, but the mechanism of these weak interactions promoting and guiding the self-assembly process of nanoparticles is rarely studied. In this paper, concentric self-assemblies with multilayer structures were synthesized by using rare-earth complexes in solution for the first time, and a solvent-induced self-assembly strategy was developed. The assembly process and assembly mechanism were explained by quasi-in situ transmission electron microscopy (TEM) and super-resolution microscopy imaging technology, combined with density functional theory (DFT) calculations. By assembling rare-earth complexes into ordered nanomaterials in aqueous solution, the physicochemical properties of the complexes can be effectively regulated, such as enhancing luminescence, promoting water dispersibility and increasing designability. By changing the ligand structure, it is proved that the method has a certain universality. This work not only provides a theoretical basis for further study of the assembly behavior of rare-earth complexes in aqueous solutions, but also provides a new strategy for the design of self-assembled nanomaterials.

Solvent-induced ordered self-assembly of rare-earth complexes

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