用于智能冷链监测的动力学捕获持久室温磷光状态的氧不依赖光激活

IF 7.4 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Shulin Liu  (, ), Chensheng Li  (, ), Weijia Xie  (, ), Aoyuan Cheng  (, ), Yingxiao Mu  (, ), Yanping Huo  (, ), Fushun Liang  (, ), Guoqing Zhang  (, )
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引用次数: 0

摘要

刺激响应室温磷光(RTP)材料在环境稳健性和时空可控性方面面临挑战,特别是在氧和温度敏感应用中。本研究利用聚乙烯醇(PVA)的高氧透性屏障及其对某些多芳烃的光化学反应,制备了菲和三苯掺杂的PVA薄膜,该薄膜具有光活化性和持久性RTP,其余辉时间为70 s,可能是通过动力学捕获自由基途径。具体来说,这种紫外线增强的持久性RTP发生在有氧和厌氧条件下,与通过光诱导的分子氧耗尽的常规RTP开启机制形成对比。激活的RTP状态显示出温度依赖的动力学持久性,即在25°C下持续~ 5小时,而在4°C下持续~ 72小时,产生不可逆的RTP从“开”到“关”切换,是累积温度监测的理想选择。印在易腐物品(如鲜奶瓶)上的ppa基油墨图案可用于通过RTP衰变动力学来量化环境暴露(相对强度损失>;84.2%,在25°C和4°C下3小时)。目前的研究为设计可编程RTP材料建立了一个动力学控制策略,解决了智能传感和质量保证方面未满足的需求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Oxygen-independent photoactivation of kinetically trapped persistent room-temperature phosphorescence state for smart cold-chain monitoring

Stimuli-responsive room-temperature phosphorescence (RTP) materials face challenges in environmental robustness and spatiotemporal controllability, particularly for oxygen- and temperature-sensitive applications. Here, by taking advantage of the high oxygen-permeability barrier of polyvinyl alcohol (PVA) and its photochemical reaction toward certain polyaromatic hydrocarbons, we present phenanthrene- and triphenylene-doped PVA films that exhibit photoactivatable and persistent RTP, with an observable afterglow time >70 s by the naked eye, likely via a kinetically trapped radical pathway. Specifically, such UV-enhanced persistent RTP occurs under both aerobic and anaerobic conditions, contrasting with a regular RTP turn-on mechanism via photo-induced molecular oxygen depletion. The activated RTP state shows temperature-dependent kinetic persistence, i.e., lasting ∼5 h at 25°C vs. ∼72 h at 4°C, creating irreversible RTP switching from “on” to “off” ideal for cumulative temperature monitoring. The PVA-based ink patterns printed on perishables (e.g., fresh milk bottles) can be used to quantify ambient exposure via RTP decay kinetics (relative intensity loss >84.2% after 3 h at 25°C vs. at 4°C). The current study establishes a kinetic-control strategy for designing programmable RTP materials, addressing unmet needs in smart sensing and quality assurance.

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来源期刊
Science China Materials
Science China Materials Materials Science-General Materials Science
CiteScore
11.40
自引率
7.40%
发文量
949
期刊介绍: Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.
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