Li Danyang, Liu Xin, Yang Linlin, Li Hechuan, Guo Guoxu, Li Xuezhao, He Cheng
State Key Laboratory of Fine Chemicals, Dalian University of Technology Dalian 116012 P. R. China
Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University Xinxiang 453003 P. R. China.
Chem Sci. 2023 Jan 31;14(8):2237-2244. doi: 10.1039/d2sc06022a. eCollection 2023 Feb 22.
The host-guest strategy presents an ideal way to achieve efficient Förster resonance energy transfer (FRET) by forcing close proximity between an energy donor and acceptor. Herein, by encapsulating the negatively charged acceptor dyes eosin Y (EY) or sulforhodamine 101 (SR101) in the cationic tetraphenylethene-based emissive cage-like host donor Zn-1, host-guest complexes were formed that exhibit highly efficient FRET. The energy transfer efficiency of Zn-1⊃EY reached 82.4%. To better verify the occurrence of the FRET process and make full use of the harvested energy, Zn-1⊃EY was successfully used as a photochemical catalyst for the dehalogenation of α-bromoacetophenone. Furthermore, the emission color of the host-guest system Zn-1⊃SR101 could be adjusted to exhibit bright white-light emission with the CIE coordinates (0.32, 0.33). This work details a promising approach to enhance the efficiency of the FRET process by the creation of a host-guest system between the cage-like host and dye acceptor, thus serving as a versatile platform for mimicking natural light-harvesting systems.
主客体策略提供了一种通过迫使能量供体和受体紧密靠近来实现高效Förster共振能量转移（FRET）的理想方法。在此，通过将带负电荷的受体染料曙红Y（EY）或磺基罗丹明101（SR101）封装在基于阳离子四苯乙烯的发光笼状主体供体Zn-1中，形成了表现出高效FRET的主客体复合物。Zn-1⊃EY的能量转移效率达到82.4%。为了更好地验证FRET过程的发生并充分利用所收集的能量，Zn-1⊃EY成功地用作α-溴苯乙酮脱卤反应的光化学催化剂。此外，主客体体系Zn-1⊃SR101的发射颜色可被调节为呈现CIE坐标为（0.32，0.33）的明亮白光发射。这项工作详细介绍了一种通过在笼状主体和染料受体之间创建主客体体系来提高FRET过程效率的有前景的方法，从而作为模仿自然光捕获系统的通用平台。
