期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 30, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202202977
关键词
Bidibenzo[b; d]furan; Circularly-Polarized Luminescence; Locked Axial Chirality; Poly(Vinyl Alcohol); Room-Temperature Phosphorescence
资金
- National Natural Science Foundation of China [21975061]
- Natural Science Foundation of Guangdong Province [2019A1515011050]
- Shenzhen Fundamental Research Program [JCYJ20190806142403535, GXWD20201230155427003-20200728150952003]
In this study, a new bidibenzo[b,d]furan compound was reported to exhibit strong circularly-polarized RTP when doped into a rigid polymer matrix. The absolute chiral R-isomer could be separated using a simple silica-gel column. The treated films showed high RTP efficiency, dissymmetric factor, and lifetime under ambient conditions. It was found that reducing nonradiative decays could enhance circularly-polarized RTP emission.
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.
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