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Liu, Hanzhou; Qin, Haoming; Shen, Nannan; Yan, Siqi; Wang, Yaxing; Yin, Xuemiao; Chen, Xinjian; Zhang, Chao; Dai, Xing; Zhou, Ruhong; Ouyang, Xiaoping; Chai, Zhifang; Wang, Shuao
Angewandte Chemie International Edition, August 24, 2020, Letnik: 59, Številka: 35Journal Article
Radio‐photoluminescence (RPL) materials display a distinct radiation‐induced permanent luminescence center, and therefore find application in the detection of ionizing radiation. The current inventory of RPL materials, which were discovered by serendipity, has been limited to a small number of metal‐ion‐doped inorganic materials. Here we document the RPL of a metal–organic framework (MOF) for the first time: X‐ray induced free radicals are accumulated on the organic linker and are subsequently stabilized in the conjugated fragment in the structure, while the metal center acts as the X‐ray attenuator. These radicals afford new emission features in both UV‐excited and X‐ray excited luminescence spectra, making it possible to establish linear relationships between the radiation dose and the normalized intensity of the new emission feature. The MOF‐based RPL materials exhibit advantages in terms of the dose detection range, reusability, emission stability, and energy threshold. Based on a comprehensive electronic structure and energy diagram study, the rational design and a substantial expansion of candidate RPL materials can be anticipated. Radio‐photoluminescence in MOFs: The first metal–organic framework (MOF) to display radio‐photoluminescence (RPL) may lead to a new generation of RPL dosimeters showing advantages in terms of detection sensitivity, detection range, reusability, stability, and energy threshold over the existing commercial materials.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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