Synthesis, Fluorescence Regulation and White-Light Emission of Ln-MOFs Incorporating Trivalent Rare Earth Ions (Ln3+, Eu3+, Tb3+)

Abstract

This study reports on the synthesis, fluorescence modulation, and white-light emission characteristics of a series of isostructural lanthanide-based metal-organic frameworks (Ln-MOFs). The synthesized materials demonstrated exceptional color rendering capabilities, design flexibility, color tunability, and high fluorescence efficiencies. Through strategic doping, a range of mono- and co-doped complexes were successfully obtained, enabling precise tuning of the fluorescence properties. An optimized white-light-emitting material was developed based on the additive color mixing principle of the three primary colors. The fluorescence attributes, including brightness, luminescence lifetime, quantum yield, and color purity, were comprehensively evaluated. Furthermore, the complexes exhibited notable fluorescence quenching effects in response to Cd²⁺ ions, highlighting their potential as sensors for the detection of cadmium ions in complex metal ion solutions. This research offers valuable insights into the advancement of Ln-MOFs for applications in white-light emission and fluorescence-based sensing.