To impart processability and practical serviceability to organic room temperature phosphorescence (RTP) molecules, and address phase separation and rigid confinement environment of conventional RTP polymers, a small amount of Schiff base bonds crosslinked tetraphenylene luminescence networks are pinned to the borate ester bonds crosslinked epoxy networks producing reversible interlocked polymer networks-based halogen-free RTP material. By taking advantage of the conjugation interaction of Schiff base linkages, and phase separation inhibition/molecular confinement effects of the interlocking networks, excellent fluorescence quantum yield (up to 78.9 %), RTP lifetime (660 ms) and quantum yield (16.7 %) are achieved with ultra-low concentration of luminophores (0.05 wt%). Moreover, the resultant acquires decent tensile strength (3.8 MPa) and a high elongation-at-break (365 %) owing to its unique molecular design. The phosphorescence lifetimes (457 ∼ 602 ms) are only slightly affected even after cyclic stretching (at 50 % strain for 100 cycles), or soaking in water (for 30 days), or heating (90 °C). The built-in reversible covalent bonds and the topological network reorganization further enable injection molding and self-healing of the material. Having been repeatedly crushed/hot-pressed, the recycled material still shows RTP lifetime and quantum yield of 398 ms and 14.6 %, respectively. The present work provides a feasible approach to fabricate multifunctional robust organic phosphorescent materials with application prospects.

中文翻译：

---

多功能室温磷光聚合物，发光体含量低至 0.05 wt%


为了赋予有机室温磷光（RTP）分子可加工性和实际适用性，并解决传统RTP聚合物的相分离和刚性约束环境，将少量席夫碱键交联四亚苯基发光网络固定在硼酸酯键交联环氧网络上生产基于可逆互锁聚合物网络的无卤RTP材料。通过利用席夫碱键的共轭相互作用以及互锁网络的相分离抑制/分子限制效应，获得了优异的荧光量子产率（高达 78.9%）、RTP 寿命（660ms）和量子产率（16.7%）通过超低浓度的发光体（0.05 wt%）实现。此外，由于其独特的分子设计，所得产物具有良好的拉伸强度（3.8MPa）和高断裂伸长率（365％）。即使经过循环拉伸（50%应变，100个循环）、浸泡在水中（30天）或加热（90°C）后，磷光寿命（457∼602毫秒）也仅受到轻微影响。内置的可逆共价键和拓扑网络重组进一步实现了材料的注射成型和自修复。经过反复粉碎/热压后，回收材料的 RTP 寿命和量子产率仍然分别为 398 毫秒和 14.6%。本工作为制备具有应用前景的多功能鲁棒有机磷光材料提供了可行的方法。