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Emergence of Uranium as a Distinct Metal Center for Building Intrinsic X‐ray Scintillators

Journal Article · · Angewandte Chemie
 [1];  [2];  [2];  [2];  [3];  [2];  [2];  [2];  [2];  [4];  [2];  [5];  [2]
  1. State Key Laboratory of Radiation Medicine and Protection School for Radiological and interdisciplinary Sciences (RAD-X) Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow University Suzhou 215123 China, Key Laboratory of Radiation Physics and Technology Ministry of Education Institute of Nuclear Science and Technology Sichuan University Chengdu 610064 China
  2. State Key Laboratory of Radiation Medicine and Protection School for Radiological and interdisciplinary Sciences (RAD-X) Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow University Suzhou 215123 China
  3. Key Laboratory of Transparent Opto-functional Inorganic Materials Chinese Academy of Sciences Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 201899 China
  4. Key Laboratory of Radiation Physics and Technology Ministry of Education Institute of Nuclear Science and Technology Sichuan University Chengdu 610064 China
  5. Department of Chemistry and Biochemistry Florida State University 95 Chieftain Way Tallahassee FL 32306 USA
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Abstract

The combination of high atomic number and high oxidation state in U VI materials gives rise to both high X‐ray attenuation efficiency and intense green luminescence originating from ligand‐to‐metal charge transfer. These two features suggest that U VI materials might act as superior X‐ray scintillators, but this postulate has remained substantially untested. Now the first observation of intense X‐ray scintillation in a uranyl–organic framework ( SCU‐9 ) that is observable by the naked eye is reported. Combining the advantage in minimizing the non‐radiative relaxation during the X‐ray excitation process over those of inorganic salts of uranium, SCU‐9 exhibits a very efficient X‐ray to green light luminescence conversion. The luminescence intensity shows an essentially linear correlation with the received X‐ray intensity, and is comparable with that of commercially available CsI:Tl. SCU‐9 possesses an improved X‐ray attenuation efficiency ( E >20 keV) as well as enhanced radiation resistance and decreased hygroscopy compared to CsI:Tl.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0016568
OSTI ID:
1434071
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 26 Vol. 130; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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