Visible colorimetric dosimetry of UV and ionizing radiations by a dual-module photochromic nanocluster

Huangjie Lu, Jian Xie, Xin-Yu Wang, Yaxing Wang, Zi-Jian Li, Kariem Diefenbach, Qing-Jiang Pan (), Yuan Qian, Jian-Qiang Wang, Shuao Wang () and Jian Lin ()
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Huangjie Lu: Shanghai Institute of Applied Physics, Chinese Academy of Sciences
Jian Xie: Soochow University
Xin-Yu Wang: Heilongjiang University
Yaxing Wang: Soochow University
Zi-Jian Li: Shanghai Institute of Applied Physics, Chinese Academy of Sciences
Kariem Diefenbach: Shanghai Institute of Applied Physics, Chinese Academy of Sciences
Qing-Jiang Pan: Heilongjiang University
Yuan Qian: Shanghai Institute of Applied Physics, Chinese Academy of Sciences
Jian-Qiang Wang: Shanghai Institute of Applied Physics, Chinese Academy of Sciences
Shuao Wang: Soochow University
Jian Lin: Shanghai Institute of Applied Physics, Chinese Academy of Sciences

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract 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, [Th6(OH)4(O)4(H2O)6](TPC)8(HCOO)4∙4DMF∙H2O (Th-SINAP-100), by judiciously incorporating heavy Th6 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.

Date: 2021
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DOI: 10.1038/s41467-021-23190-0

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