文献类型：期刊文献

英文题名：Coordination-Induced Structural Rigidity for Achieving Ultralong-Lived Aqueous Room Temperature Phosphorescence

作者：Liang, Li Ya[1];Gao, Ya Ting[1];Chang, Shuai[1];Lv, Jian[1];Wang, Lu[1];Liu, Meng Li[2];Wu, Da Jun[1];Ye, Ming Jie[1];Chen, Bin Bin[1];Li, Da Wei[1]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn,Key Lab Adv Mat,Shanghai Key L, Shanghai 200237, Peoples R China;[2]Chinese Univ Hong Kong, Shenzhen CUHK Shenzhen, Dept Affiliated Hosp 2, Sch Med, Shenzhen 518172, Guangdong, Peoples R China

年份：2024

卷号：12

期号：34

外文期刊名：ADVANCED OPTICAL MATERIALS

收录：;EI(收录号：20243516953173);WOS:【SCI-EXPANDED(收录号:WOS:001299557900001)】；

基金：The authors appreciate the financial support from the National Natural Science Foundation of China (21974046, 22176058, and 21977031), the Fundamental Research Funds for the Central Universities (222201717003), the Science and Technology Commission of Shanghai Municipality (2018SHZDZX03), and the China Postdoctoral Science Foundation (2021M701195). The authors also thank the Research Center of Analysis and Test of East China University of Science and Technology for the help with the characterization.

语种：英文

外文关键词：anions recognition; aqueous room-temperature phosphorescence; coordination-induced structural rigidity; metal-organic coordination

摘要：Designing ultralong-lived aqueous room temperature phosphorescence (RTP) materials has become an actively pursued but challenging research area. Herein, a coordination-induced structural rigidity (CISR) strategy is proposed to achieve ultralong RTP lifetime in magnesium/pyromellitic acid phosphorescent materials (Mg/PMA-PMs) with abundant Mg2+ ions sites and hydrophilic groups in aqueous solution. Compared to their dry state (448.77 ms), the lifetime of Mg/PMA-PMs significantly increases to 1026.17 ms with the addition of a small amount of water (50 wt%). Even in a fully non-deoxygenated aqueous environment (above 200 wt% water), where Mg/PMA-PMs disintegrate to form a nanosuspension, they still exhibit an ultralong aqueous RTP lifetime of approximate to 800 ms. The water-enhanced RTP properties are attributed to water molecules coordinating with Mg2+ ions and acting as bridging agents to bind with hydrophilic groups through hydrogen bonding. This interaction rigidifies functional groups and inhibits their motions, leading to a substantial reduction in nonradiative decay. Furthermore, the CISR mechanism effectively explains the RTP enhancement effect of water on inorganic salt phosphorescent systems. This work not only provides a new approach for constructing efficient aqueous RTP materials, but also develops a powerful tool for visual anion recognition. In this work, magnesium/pyromellitic acid phosphorescent materials (Mg/PMA-PMs) with abundant Mg2+ ions sites and hydrophilic groups are prepared. The Mg/PMA-PMs show an ultralong aqueous RTP lifetime, which is proven to be attributed to the unique coordination-induced structural rigidity mechanism. Because of the coordination-regulated RTP properties, the Mg/PMA-PMs can be used for visual anions recognition in aqueous solutions. image