Zhou Wei-Lei, Lin Wenjing, Chen Yong, Liu Yu
College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University Tianjin 300071 P. R. China
College of Chemistry and Material Science, Inner Mongolia Key Laboratory of Chemistry for Nature Products and Synthesis for Functional Molecules, Innovation Team of Optical Functional Molecular Devices, Inner Mongolia Minzu University Tongliao 028000 P. R. China.
Chem Sci. 2022 Jun 6;13(27):7976-7989. doi: 10.1039/d2sc01770a. eCollection 2022 Jul 13.
Purely organic room temperature phosphorescence, especially in aqueous solution, is attracting increasing attention owing to its large Stokes shift, long lifetime, low preparation cost, low toxicity, good processing performance advantages, and broad application value. This review mainly focuses on macrocyclic (cyclodextrin and cucurbituril) hosts, nanoassembly, and macromolecule (polyether) confinement-driven RTP. As an optical probe, the assembly and the two-stage assembly strategy can realize the confined purely organic RTP and achieve energy transfer and light-harvesting from fluorescence to delayed fluorescence or phosphorescence. This supramolecular assembly is widely applied for luminescent materials, cell imaging, and other fields because it effectively avoids oxygen quenching. In addition, the near-infrared excitation, near-infrared emission, and imaging of purely organic room temperature phosphorescence in assembled confinement materials are also prospected.
纯有机室温磷光，尤其是在水溶液中，因其具有大斯托克斯位移、长寿命、制备成本低、毒性低、加工性能良好等优点以及广泛的应用价值而受到越来越多的关注。本综述主要聚焦于大环（环糊精和葫芦脲）主体、纳米组装以及大分子（聚醚）限域驱动的室温磷光。作为一种光学探针，该组装体及两步组装策略能够实现限域纯有机室温磷光，并实现从荧光到延迟荧光或磷光的能量转移及光捕获。这种超分子组装体由于有效避免了氧猝灭而被广泛应用于发光材料、细胞成像等领域。此外，还展望了组装限域材料中纯有机室温磷光的近红外激发、近红外发射及成像。
