构建室温磷光(RTP)材料的一般方法包括将磷光发射体结合到具有高玻璃化转变温度的刚性主体或聚合物中。然而,这些材料通常具有较差的加工性能和次优的机械性能,限制其实际应用。在这项工作中,我们开发了基于苯并噻二唑的二烯烃(BTD-HEA),一种多功能磷光发射体,具有显著的系统间交叉产量(ΦISC,99.83%)。其高的三重态激子生成能力和二烯烃结构使BTD-HEA能够作为光引发剂和交联剂,在120秒内有效地引发各种单体的聚合。一系列柔性磷光凝胶,包括水凝胶,有机凝胶,离子凝胶,制造气凝胶,表现出突出的拉伸性和可恢复性。此外,凝胶独特的荧光-磷光比色特性为目视测定聚合过程提供了更灵敏的方法。值得注意的是,水凝胶的磷光发射强度可以通过冰的形成来增加,允许水凝胶冷冻的精确检测。这种发射器的多功能性为使用微流体制造具有不同形态的各种柔性磷光凝胶铺平了道路,薄膜剪切,辊涂工艺,和二维/三维打印,展示了其在生物成像和生物工程领域的潜在应用。
A general approach to constructing room temperature phosphorescence (RTP) materials involves the incorporation of a phosphorescent emitter into a rigid host or polymers with high glass transition temperature. However, these materials often suffer from poor processability and suboptimal mechanical properties, limiting their practical applications. In this work, we developed benzothiadiazole-based dialkene (BTD-HEA), a multifunctional phosphorescent emitter with a remarkable yield of intersystem crossing (ΦISC, 99.83 %). Its high triplet exciton generation ability and dialkene structure enable BTD-HEA to act as a photoinitiator and crosslinker, efficiently initiating the polymerization of various monomers within 120 seconds. A range of flexible phosphorescence gels, including hydrogels, organogels, ionogels, and aerogels were fabricated, which exhibit outstanding stretchability and recoverability. Furthermore, the unique fluorescent-phosphorescent colorimetric properties of the gels provide a more sensitive method for the visual determination of the polymerization process. Notably, the phosphorescent emission intensity of the hydrogel can be increased by the formation of ice, allowing for the precise detection of hydrogel freezing. The versatility of this emitter paves the way for fabricating various flexible phosphorescence gels with diverse morphologies using microfluidics, film-shearing, roll coating process, and two/three-dimensional printing, showcasing its potential applications in the fields of bioimaging and bioengineering.