文献类型：期刊文献

英文题名：An elastic organic crystal with multilevel stimuli- responsive room temperature phosphorescence

作者：Song, Jinming[1,2];Zhou, Yuhang[1,2];Pan, Zhichao[1,2];Hu, Ying[1,2];He, Zhenyi[1,2];Tian, He[1,2];Ma, Xiang[1,2]

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

年份：2023

卷号：6

期号：6

起止页码：2005

外文期刊名：MATTER

收录：;EI(收录号：20232314189629);WOS:【SCI-EXPANDED(收录号:WOS:001043994200001)】；

基金：The authors thank B. Zhu, L. Ma, T. Jiang, Z. Huang, S. Sun, and Z. Yan for helpful discussion. We gratefully acknowledge the financial support from the National Key Research and Development Program of China (2022YFB3203500) and NSFC (21788102, 22125803, and 22020102006) , project support by the Shanghai Municipal Science and Technology Major Project (grant no. 2018SHZDZX03) , the Program of Shanghai Academic/Technology Research Leader (20XD1421300) , and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Conformations - Crystals - Elasticity - Grinding (machining) - Phosphorescence

摘要：In this work, we report a series of single-component molecules crystals named dialkyl 4,40-oxalyldibenzoate (n-BZ) with both efficient room temperature phosphorescence (RTP) emission, multilevel stimuli responsiveness, and elasticity or flexibility. The crystalline n-BZ will change from original RTP single emission to RTP dual emission after grinding or thermal annealing (TA). Interestingly, the emission wavelength difference between the RTP dual-emission peaks after grinding or TA reaches 82 nm with emission color changes from cyan blue to orange. In addition, to our knowledge, the largest RTP quantum yield of 25.1% (6-BZ) has been achieved as the highest recorded for organic RTP elastic crystals. Through a series of experiments and theoretical calculations, we demonstrate that the multilevel stimuli responsiveness of n-BZ originates from the transition of excited state conformation and its elasticity from many weak intermolecular interactions, which will provide a molecular design and construction strategy for organic stimuli-responsive RTP materials.