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Emergence of Uranium as a Distinct Metal Center for Building Intrinsic X‐ray Scintillators
Author(s) -
Wang Yaxing,
Yin Xuemiao,
Liu Wei,
Xie Jian,
Chen Junfeng,
Silver Mark A.,
Sheng Daopeng,
Chen Lanhua,
Diwu Juan,
Liu Ning,
Chai Zhifang,
AlbrechtSchmitt Thomas E.,
Wang Shuao
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201802865
Subject(s) - scintillator , luminescence , uranium , uranyl , scintillation , chemistry , metal , radiative transfer , x ray , attenuation , materials science , analytical chemistry (journal) , physics , optics , optoelectronics , nuclear physics , chromatography , organic chemistry , detector
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.