Visible colorimetric dosimetry of UV and ionizing radiations by a dual-module photochromic nanocluster.
Huangjie LuJian XieXin-Yu WangYaxing WangZi-Jian LiKariem DiefenbachQing-Jiang PanYuan QianJian-Qiang WangShu-Ao WangJian LinPublished in: Nature communications (2021)
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.
Keyphrases
- density functional theory
- radiation induced
- molecular dynamics
- high resolution
- gold nanoparticles
- low dose
- monte carlo
- aqueous solution
- sensitive detection
- quantum dots
- magnetic resonance imaging
- label free
- hydrogen peroxide
- high throughput
- single cell
- risk assessment
- cancer therapy
- genome wide
- nitric oxide
- energy transfer
- molecular dynamics simulations
- crystal structure
- water soluble
- single molecule
- electron microscopy
- life cycle