Encapsulation and Sensitization of UV–vis and Near Infrared Lanthanide Hydrate Emitters for Dual- and Bimodal-Emissions in Both Air and Aqueous Media Based on a Porous Heteroatom-Rich Cd(II)-Framework

A porous heteroatom-rich Cd­(II)-polymeric framework which is generated from an ethylene glycol ether-bridging dicarboxylate ligand L, 4,4′-bipy and Cd­(II) ion is reported. It contains one-dimensional tubes (9–11 Å) which are able to trap cationic lanthanide hydrates such as Eu­(H2O)83+, Tb­(H2O)83+, and Nd­(H2O)83+ under ambient conditions to generate Ln­(H2O)83+-loaded materials. In addition, the heteroatom-rich host material can effectively protect and sensitize the encapsulated Ln3+ emitters in their hydrate form in both air and aqueous media. Furthermore, the dual- and bimodal-emissions are successfully realized by intercalation of the different Ln3+-hydrates based on a guest-driven approach.