文献类型：期刊文献

英文题名：Anion/cation size modulation for tunable persistent room temperature phosphorescent organic salts

作者：Wang, Ying[1,2,3];Wang, Yilong[1,2];Yu, Jiahong[1,2];Wang, Chengyun[1,2,3];Zhao, Weijun[1,2,3]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Inst Fine Chem,Sch Chem & Mol Engn,Shanghai Key La, Frontiers Sci Ctr Materiobiol & Dynam Chem,Key Lab, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem,Joint I, Inst Fine Chem,Sch Chem & Mol Engn,Shanghai Key La, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Ctr Photosensit Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：515

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20252018435866);WOS:【SCI-EXPANDED(收录号:WOS:001495284800012)】；

基金：The authors are grateful to financial support from the National Natural Science Foundation of China (9235630033, 22105069) , Shanghai Pujiang Program (20PJ1402900) , Shanghai Natural Science Foundation (21ZR1418400, 22ZR1417300) , Innovation Program of Shanghai Municipal Education Commission (2023FGS01) .

语种：英文

外文关键词：Organic room-temperature phosphorescence; Aggregation; Molecular packing; Organic salts; Cation

摘要：Organic materials with dynamic persistent room-temperature phosphorescence (pRTP) have attracted great attention for their wide applications in display, sensing, and bioimaging. However, manipulation of the emission behaviors of organic phosphors is still challenging, due to their intricate molecular design and tedious synthesis processes. Herein, we develop a simple and versatile strategy for achieving tunable pRTP by dynamically modulating the size of anionic aromatic phosphorescent cores and cations organic salts. Remarkably, pairing large phosphorescent cores with larger-sized guanidinium ions (Gua+), rather than smaller potassium ions (K+), enables bright pRTP. Meanwhile, pairing small phosphorescent cores with Gua+ yields a blue-shifted but longerlived pRTP compared to those K+. Mechanistic studies reveal that large cations primarily weaken it-it interactions, thereby reducing triplet quenching in large phosphorescent cores, while causing a blue shift in excitation and emission wavelengths in small phosphorescent cores. Through a simple and reversible cationexchange process, organic salt-dependent multi-color pRTP (from blue to green) and lifetime (from 0.86 s to 1.28 s) can be achieved, enabling advanced applications in multiple afterglow anti-counterfeiting and dynamic information encryption.