文献类型：期刊文献

英文题名：Amorphous metal-free roomerature phosphorescent small molecules with multicolor photoluminescence via a host-guest and dual-emission strategy

作者：Li, Dengfeng[1]; Lu, Feifei[1]; Wang, Jie[1]; Hu, Wende[1]; Cao, Xiao-Ming[1]; Ma, Xiang[1]; Tian, He[1]

机构：[1] Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Center for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2018

卷号：140

期号：5

起止页码：1916

外文期刊名：Journal of the American Chemical Society

收录：EI(收录号：20180704802439)

语种：英文

外文关键词：Fluorescence - Cyclodextrins - Molecules - Hydrogen bonds - Phosphors

摘要：Metal-free roomerature phosphorescence (RTP) materials offer unprecedented potentials for photoelectric and biochemical materials due to their unique advantages of long lifetime and low toxicity. However, the achievements of phosphorescence at ambient condition so far have been mainly focused on ordered crystal lattice or on embedding into rigid matrices, where the preparation process might bring out poor repeatability and limited application. In this research, a series of amorphous organic small molecular compounds were developed with efficient RTP emission through conveniently modifying phosphor moieties to β-cyclodextrin (β-CD). The hydrogen bonding between the cyclodextrin derivatives immobilizes the phosphors to suppress the nonradiative relaxation and shields phosphors from quenchers, which enables such molecules to emit efficient RTP emission with decent quantum yields. Furthermore, one such cyclodextrin derivative was utilized to construct a host-guest system incorporating a fluorescent guest molecule, exhibiting excellent RTP-fluorescence dual-emission properties and multicolor emission with a wide range from yellow to purple including white-light emission. This innovative and universal strategy opens up new research paths to construct amorphous metal-free small molecular RTP materials and to design organic white-light-emitting materials using a single supramolecular platform. ? 2018 American Chemical Society.