Huang Wenbin, Fu Chunya, Liang Zhiwei, Zhou Kang, He Zikai
School of Science, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, P. R. China.
Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic, Shenzhen, Shenzhen, 518055, P. R. China.
Angew Chem Int Ed Engl. 2022 Jul 25;61(30):e202202977. doi: 10.1002/anie.202202977. Epub 2022 Apr 19.
Novel accessible scaffold featuring circularly-polarized room-temperature phosphorescence (RTP) is attractive but challenging. Herein, we report a new feasibly separable bidibenzo[b,d]furan compound with strong circularly-polarized RTP when doping into the rigid polymer matrix. The simple silica-gel column can separate the absolute chiral R-isomer with excellent chiroptical properties. The experimental data reveal that the treated films exhibit an RTP efficiency of 14.8 %, a largest dissymmetric factor of 0.12, and a longest lifetime of 0.56 s under ambient conditions. It is found that reducing the nonradiative decays boosts the intrinsic circularly-polarized RTP emission. The impressive results indicate that the locked axial chirality skeleton endows the potential of achieving superior circularly-polarized emission for the small organic optoelectronic molecules.
具有圆偏振室温磷光（RTP）特性的新型可加工支架很有吸引力，但也具有挑战性。在此，我们报道了一种新的、可通过硅胶柱轻易分离的联二苯并[b,d]呋喃化合物，当它掺杂到刚性聚合物基质中时具有很强的圆偏振RTP。简单的硅胶柱可以分离出具有优异手性光学性质的绝对手性R-异构体。实验数据表明，在环境条件下，处理后的薄膜表现出14.8%的RTP效率、0.12的最大不对称因子和0.56秒的最长寿命。研究发现，减少非辐射衰变可增强本征圆偏振RTP发射。这些令人印象深刻的结果表明，锁定的轴向手性骨架赋予了小有机光电分子实现卓越圆偏振发射的潜力。
