文献类型：期刊文献

英文题名：Hydrothermal synthesis and protonation of Sc/Glu-PMs based organic-inorganic amorphous microstructures for enhanced phosphorescence and optical applications

作者：Mohamed, Eshtiag Abdalla Ibrahim[1,2];Liang, Li-Ya[1];Wu, Da-Jun[1];Chen, Jia-Yi[1];Gao, Ya-Ting[1];Li, Da-Wei[1];Moodley, Roshila[3]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn, Key Lab Adv Mat,Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]Univ Bahri, Coll Appl & Ind Sci, Dept Chem & Ind Chem, Khartoum 1660, Sudan;[3]Univ Manchester, Dept Chem, Manchester M13 9PL, England

年份：2026

卷号：363

外文期刊名：MATERIALS CHEMISTRY AND PHYSICS

收录：;EI(收录号：20262420896946);WOS:【SCI-EXPANDED(收录号:WOS:001799981300001)】；

基金：The authors appreciate the financial support from the National Natural Science Foundation of China (22176058, 22504037, 22574050), the Science and Technology Commission of Shanghai Municipality (24DX1400200, 23ZR1416100, 25ZR1401082), the Program of Introducing Talents of Discipline to Universities(B16017) and the Fundamental Research Funds for the Central Universities (222201717003). We thank the Research Center of Analysis and Test of East China University of Science and Technology for their help on characterizations.

语种：英文

外文关键词：Room-temperature phosphorescence; Protonation strategy; Organic-inorganic composite; Optical encryption; Anti-counterfeiting

摘要：Scandium-glutamic acid phosphorescent materials (Sc/Glu-PMs) were synthesized via a simple one-pot hydrothermal process using Sc3+ ions and glutamic acid ligands. Structural characterization confirmed that the obtained material is an amorphous organic-inorganic composite rather than a crystalline coordination polymer. Compared with pure glutamic acid, Sc/Glu-PMs exhibited significantly enhanced room-temperature phosphorescence (RTP), attributed to coordination-induced structural rigidity that suppresses non-radiative decay pathways and stabilizes triplet excitons. Post-synthetic protonation using dilute hydrochloric acid further improved the phosphorescence quantum yield (PQY) from 7.63% to 11.07%, although a moderate decrease in phosphorescence lifetime was observed, indicating enhanced radiative decay efficiency after protonation. Surface and spectroscopic analyses suggest that protonation modifies the hydrogen-bonding environment and local surface chemistry without disrupting the bulk structure. The prepared materials also demonstrated promising optical information encryption performance, including high contrast, persistent afterglow, and good photostability under repeated UV on/off cycles. This work provides a simple coordination-protonation strategy for regulating RTP behavior in amino acid-based organic-inorganic systems for potential anti-counterfeiting and optoelectronic applications.