Huang Lili, Liu Lei, Li Xianjiang, Hu Huan, Chen Mingxing, Yang Qingyuan, Ma Zhiyong, Jia Xinru
State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Food Safety Laboratory, Division of Metrology in Chemistry, National Institute of Metrology, Beijing, 100029, China.
Angew Chem Int Ed Engl. 2019 Nov 11;58(46):16445-16450. doi: 10.1002/anie.201908567. Epub 2019 Sep 26.
A D-A-D' type pure organic molecule, named ODFRCZ, has unique triple-emission character covering fluorescence, phosphorescence, and delayed fluorescence (DF). The phosphorescence of ODFRCZ has a rather long lifetime of about 350 ms at room temperature. One dimer of ODFRCZ with enhanced parallel molecular packing acts more effectively to prompt ISC processes, which further generates room-temperature phosphorescence (RTP), owing to the larger transition dipole moment and closer energy level between S and T . ODFRCZ is a rare example of an organic RTP molecule that shows dual-stimuli responsiveness of dual-mode mechanochromism (fluorescence red-shift and RTP/DF on-off switch) and reversible crystal-state photochromism. This work may broaden the knowledge for stimuli-responsive RTP organic molecules and lay the foundation for their wide-scale applications.
一种名为ODFRCZ的D-A-D'型纯有机分子具有独特的三重发射特性，涵盖荧光、磷光和延迟荧光（DF）。ODFRCZ的磷光在室温下具有约350毫秒的相当长的寿命。ODFRCZ的一个二聚体具有增强的平行分子堆积，由于更大的跃迁偶极矩以及S和T之间更接近的能级，其能更有效地促进系间窜越（ISC）过程，进而产生室温磷光（RTP）。ODFRCZ是一种罕见的有机RTP分子实例，它表现出双模式机械变色（荧光红移和RTP/DF开关）和可逆晶体态光致变色的双刺激响应性。这项工作可能拓宽对刺激响应性RTP有机分子的认识，并为其大规模应用奠定基础。
