AI Article Synopsis
- Researchers developed hydrogen-bonded organic aromatic frameworks (HOAFs) that enable ultralong phosphorescence (UOP) in metal-free porous materials under normal conditions.
- They achieved a remarkable phosphorescence lifetime of 79.8 ms for one type of material (PhTCz-1), which continues to emit light for several seconds after the initial excitation.
- The study highlights the ability of these porous materials for oxygen sensing and offers a new principle for designing stable metal-free luminescent materials.
Article Abstract
Ultralong organic phosphorescence (UOP) based on metal-free porous materials is rarely reported owing to rapid nonradiative transition under ambient conditions. In this study, hydrogen-bonded organic aromatic frameworks (HOAFs) with different pore sizes were constructed through strong intralayer π-π interactions to enable ultralong phosphorescence in metal-free porous materials under ambient conditions for the first time. Impressively, yellow UOP with a lifetime of 79.8 ms observed for PhTCz-1 lasted for several seconds upon ceasing the excitation. For PhTCz-2 and PhTCz-3, on account of oxygen-dependent phosphorescence quenching, UOP could only be visualized in N , thus demonstrating the potential of phosphorescent porous materials for oxygen sensing. This result not only outlines a principle for the design of new HOFs with high thermal stability, but also expands the scope of metal-free luminescent materials with the property of UOP.
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| http://dx.doi.org/10.1002/anie.201800697 | DOI Listing |
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