糖与非芳香氨基酸的协同增强发光
Synergistic Luminescence Enhancement Between Sugars and Nonaromatic Amino Acids
以甜奶粉相较于普通奶粉所表现出的显著发光增强现象为切入点, 结合组分解析与模型重组, 揭示了蔗糖与酪蛋白间的协同增强发光效应及其发射特征的变化规律. 通过进一步简化模型, 构建糖-非芳香氨基酸掺杂体系, 发现糖类(如蔗糖、 糖苷)与非芳香氨基酸(如赖氨酸、 丝氨酸)之间存在普遍的协同增强发光效应. 实验结果表明, 该协同效应可显著提高发光强度与量子产率(如, 糖苷-丝氨酸体系量子产率提升超过30倍), 并延长部分体系的磷光寿命. 机理分析与理论计算揭示, 糖与非芳香氨基酸复合后, 分子间相互作用显著增强, 促进了电子的空间离域及分子构象刚性化, 协同提高了簇发射种的激发与发射效率, 从而显著提升发光性能, 为开发新型高效发光材料提供了理论基础与实践前景.
Inspired by the markedly stronger luminescence of sweet milk powder relative to regular pure milk powder, the synergistic luminescence enhancement effect and associated changes in photophysical properties were systematically investigated through compositional analysis and model reconstruction. Sugar-nonaromatic amino acid doped systems were subsequently constructed, demonstrating a universal synergistic luminescence enhancement effect between sugars(e.g., sucrose, glucoside) and nonaromatic amino acids(e.g., lysine, serine). Experimental results demonstrate that this synergistic effect significantly amplifies luminescence intensity and efficiency(e.g., the quantum yield of the glycoside-serine doped system increased by over 30-fold), and also prolongs the phosphorescence lifetime in some cases. Mechanistic analyses combined with theoretical calculations reveal that mixing sugars with nonaromatic amino acids strengthens intermolecular interactions, promotes through-space electron delocalization, and rigidifies conformations. This cooperation enhances both excitation and radiative transition efficiencies of the emissive species, boosting overall luminescent performance. Collectively, these findings provide valuable mechanistic insight and design guidelines for the development of novel luminescent materials based on simple bio-derived components.
支持信息见http: //www.cjcu.jlu.edu.cn/CN/10.7503/cjcu20250400.
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国家自然科学基金(U22A20250)
国家自然科学基金(52473185)
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