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Lu, Huangjie; Xie, Jian; Wang, Xin-Yu; Wang, Yaxing; Li, Zi-Jian; Diefenbach, Kariem; Pan, Qing-Jiang; Qian, Yuan; Wang, Jian-Qiang; Wang, Shuao; Lin, Jian
Nature communications, 05/2021, Letnik: 12, Številka: 1Journal Article
Radiation dosimeters displaying conspicuous response of irradiance are highly desirable, owing to the growing demand of monitoring high-energy radiation and environmental exposure. Herein, we present a case of dosimetry based on a discrete nanocluster, Th (OH) (O) (H O) (TPC) (HCOO) ∙4DMF∙H O (Th-SINAP-100), by judiciously incorporating heavy Th polynuclear centers as radiation attenuator and organic linkers as photo-responsive sensor. Interestingly, dual-module photochromic transitions upon multiple external stimuli including UV, β-ray, and γ-ray are integrated into this single material. The striking color change, and more significantly, the visible color transition of luminescence in response to accumulating radiation dose allow an on-site quantitative platform for naked-eye detection of ionization radiations over a broad range (1-80 kGy). Single crystal X-ray diffraction and density functional theory calculations reveal that the dual-module photochromism can be attributed to the π(TPC) → π*(TPC) intermolecular charge transfer driven by enhanced π-π stacking interaction between the adjacent TPC moieties upon irradiation.
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