Three-dimensional organic cage with narrowband delayed fluorescence

• 作者: Dongge Ma Fei Huang Jingwen Yao Li Li Shi-Jian Su Yingyuan Hu Zeng Xu Zhenfeng Wang
• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2020,（7）
• 页码范围: 897-903
• 页数: 7页
• 语种: 英文

摘要

A new type of simple emissive organic cage consisting of diphenyl sulfone units and nitrogen atoms was developed via one-pot C-N coupling condensation or two-step reactions along with a series of sulfoxide cages obtained,which exhibited excellent chemical modifiability and structural stability.By precisely controlling the participation of donor and acceptor units,a highly soluble organic cage with delayed fluorescence was obtained for the first time.More interestingly,due to the restriction of intramolecular flipping by locking the building blocks within a rigid framework,this emissive organic cage further showed narrowband ultra-deep blue electroluminescence emission at 413 nm with a full-width at half-maximum of 35 nm.This finding not only expands the family of electroluminescent organic cages,but also opens up a new platform for delayed fluorescence materials with high solubility and color purity.