Fan Tianjiao, Zhang Yuewei, Zhang Dongdong, Duan Lian
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, China.
Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, P. R. China.
Chemistry. 2022 May 11;28(27):e202104624. doi: 10.1002/chem.202104624. Epub 2022 Mar 18.
Narrowband, full-color, and quenching-resistant emitters are urgently needed for the next generation high-resolution displays. Though the flourishment of narrowband multiple resonance (MR) emitters in blue region, these materials still face thorny challenges such as effective light-color regulation strategies and concentration-induced spectral broadening/emission quenching. Herein, the research status of an effective "decoration strategy for para B position" is highlighted. On one hand, the introduction of an electron donor or acceptor could induce a hypsochromic- or bathochromic-shift emission, respectively, without undesirable FWHM broadening. On the other hand, a more advanced molecular motif is further proposed through adopting a peripheral benzene ring on the para position of the B-substituted phenyl in MR core to construct the high-purity, high-efficiency, quenching-resistant and stable MR emitters. Such concept is expected to provide a possible way for the modification, optimization and expansion of MR emitters to meet more possible applications.
下一代高分辨率显示器迫切需要窄带、全彩且抗猝灭的发光体。尽管窄带多共振（MR）发光体在蓝色区域蓬勃发展，但这些材料仍面临棘手的挑战，如有效的光色调节策略以及浓度诱导的光谱展宽/发射猝灭。在此，重点介绍了一种有效的“对位B位修饰策略”的研究现状。一方面，引入电子供体或受体可分别诱导发射峰发生蓝移或红移，且半高宽（FWHM）不会出现不良展宽。另一方面，通过在MR核中B取代苯基的对位采用外围苯环，进一步提出了一种更先进的分子结构，以构建高纯度、高效率、抗猝灭且稳定的MR发光体。这一概念有望为MR发光体的改性、优化和扩展提供一条可能的途径，以满足更多潜在应用。
