文献类型：期刊文献

英文题名：Achieving Efficient Dark Blue Room-Temperature Phosphorescence with Ultra-Wide Range Tunable-Lifetime

作者：Zhou, Lei[1,2];Song, Jinming[1,2];He, Zhenyi[1,2];Liu, Yiwei[1,2];Jiang, Ping[1,2];Li, Tao[1,2];Ma, Xiang[1,2]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Key Lab Adv Mat, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Noble Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Frontiers Sci Materiobiol & Dynam Chem, Meilong Rd 130, Shanghai 200237, Peoples R China

年份：2024

卷号：63

期号：22

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20241615933928);WOS:【SCI-EXPANDED(收录号:WOS:001203034200001)】；

基金：We gratefully acknowledge the financial support from the National Key Research and Development Program of China (grant no. 2022YFB3203500), the National Natural Science Foundation of China (22125803, and 22020102006), project support by the Shanghai Municipal Science and Technology Major Project (grant no. 2018SHZDZX03), and the Fundamental Research Funds for the Central Universities. The authors thank Dr. L. Ma for help.

语种：英文

外文关键词：dark blue luminescence; methyl benzoate; room-temperature phosphorescence; substituent engineering; tunable phosphorescence lifetime

摘要：Tunable-lifetime room-temperature phosphorescence (RTP) materials have been widely studied due to their broad applications. However, only few reports have achieved wide-range lifetime modulation. In this work, ultra-wide range tunable-lifetime efficient dark blue RTP materials were realized by doping methyl benzoate derivatives into polyvinyl alcohol (PVA) matrix. The phosphorescence lifetimes of the doped films can be increased from 32.8 ms to 1925.8 ms. Such wide range of phosphorescence lifetime modulation is extremely rare in current reports. Moreover, the phosphorescence emission of the methyl 4-hydroxybenzoate-doped film is located in the dark blue region and the phosphorescence quantum yield reaches as high as 15.4 %, which broadens their applications in organic optoelectronic information. Further studies demonstrated that the reason for the tunable lifetime was that the magnitude of the electron-donating ability of the substituent group modulates the HOMO-LUMO and singlet-triplet energy gap of methyl benzoate derivatives, as well as the ability to non-covalent interactions with PVA. Moreover, the potential applications of luminescent displays and optical anti-counterfeiting of these high-performance dark blue RTP materials have been conducted. A set of efficient dark blue room-temperature phosphorescent materials with tunable-lifetime have been prepared. The phosphorescence lifetime of the doped films can be continuously increased from 32.8 ms to 1925.8 ms. The reason is that the electron-donating ability of the substituent group can modulate the HOMO-LUMO and singlet-triplet energy gap, as well as the interactive force with methyl benzoate derivatives and polyvinyl alcohol. image