Lanthanide Functionalized Covalent Organic Frameworks Hybrid Materials for Luminescence Responsive Chemical Sensing

Abstract

Covalent organic frameworks (COFs) possess several unique features of structural and functional chemistry, together with other modular photophysical performance, which make them candidates for luminescence responsive chemical sensing. Lanthanide (Ln3+) functionalized COFs hybrid materials still keep the parent COFs’ virtues and also embody the abundant multiple luminescence response with both COFs and Ln3+ ions or other guest species. In this review, the summary is highlighted on the lanthanide functionalized COFs hybrid materials and their relevant systems for luminescence responsive chemical sensing. It is subdivided into five sections involving the three main topics. Firstly, the basic knowledges of COFs materials related to the luminescence responsive chemical sensing are introduced (including three sections), involving the chemistry, application and post‐synthetic modification (PSM) of COFs, the luminescence and luminescence responsive chemical sensing, and the luminescence responsive chemical sensing of non‐lanthanide functionalized COFs hybrids materials. Secondly, the systematic progresses are outlined on the lanthanide functionalized COFs hybrid materials in luminescence responsive chemical sensing, which is the emphasis for this review. Finally, the conclusion and prospect are given.

Two Three-Dimensional LnIII Coordination Polymers Exhibiting Luminescent Sensing and a Magnetocaloric Effect

“…Currently, luminescence probes are widely used in biodetection, optical imaging, and other fields as a sensitive means of detection owing to their exceptional attributes including heightened selectivity, sensitivity, prompt detection capabilities, and straightforward operational procedures. , The 4f electrons of Ln III ions are shielded by the 5s 2 5p 6 electrons of the outer shell layer so that the crystal field has little effect on them, and thus they exhibit purely colorful narrow linear emission characteristics, i.e., long emission lifetimes, sharp emission profiles, and large Stokes shifts in the visible and near-infrared (NIR) regions, − making substances containing lanthanide ions useful for the detection of DPA. − But the practical application of lanthanide complexes for detecting DPA is limited mainly due to their susceptibility to luminescence bursting by high-energy O–H vibrations in water, despite their effectiveness in acetonitrile. For example, Yang’s group successfully synthesized the first high-nuclearity lanthanide nanoring, Eu 18 , for the ratiometric luminescence detection of DPA in CH 3 CN using two polydentate organic ligands.…”