A single-component supramolecular organic framework with efficient ultralong phosphorescence

Supramolecular organic frameworks (SOFs), due to the atomically precise integration of the repeated building units, exhibit intriguing properties and consequently potential applications in chemical and materials science communities. However, it remains a great challenge to achieve SOFs with ultralong organic phosphorescence (UOP) in a single-component system. Herein, we report metal-free organic compound 9,9′-(6-(2-bromophenethoxy)-1,3,5-triazine-2,4-diyl)bis(9H-carbazole) (DCzPO) with UOP behavior. Owing to the combination of multiple supramolecular interactions, DCzPO formed a SOF structure with regular hexagonal holes, which shows an ultralong emission lifetime of 398 ms and a phosphorescence efficiency of 3%. So far as we know, among the reported luminescent SOFs, this one is the most highly efficient. This single-component SOF with ultralong phosphorescence will provide a new platform to rationally combine UOP and porous materials.