Temperature‐Inert Coinage Metal Cluster Scintillator
Abstract
Abstract Scintillators can convert high‐energy ionizing radiation, such as X‐ray, into low‐energy ultraviolet‐visible photons, and they have been widely used in various fields. However, like most luminogens, the emission intensity of a scintillator is usually influenced by the environmental temperature, increasing the temperature results in extreme decreases in radioluminescence. Here, a temperature‐inert coinage metal cluster scintillator of Cu 4 S was prepared, and it exhibited not only intense radioluminescence at room temperature but also minimal fluctuations from 80 to 450 K. Mechanism study revealed that Cu 4 S is a typical thermally activated delayed fluorescence (TADF) luminogen. Owing to the strong C─H··· π interactions between the clusters, the geometric relaxation of Cu 4 S was restricted during the spin crossover process, leading to an exceptionally small reorganization energy. This induced intersystem crossing within the Marcus inverted region, resulting in temperature‐independent luminescence behavior. More importantly, Cu 4 S metal cluster has excellent water‒oxygen stability and thermal stability and can be used to prepare flexible scintillator screen with polydimethylsiloxane (PDMS). On the basis of these features, temperature‐independent high‐resolution X‐ray imaging with the Cu 4 S ‐PDMS scintillator screen was achieved, and the resolution at different temperatures was maintained above 20 LP mm −1 .
Article Details
Authors (11)
You‐Song Hu
Tianjian Laboratory of Advanced Biomedical Sciences Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
Yan‐Hao Liu
Tianjian Laboratory of Advanced Biomedical Sciences Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
Ruo‐Yu Cao
Tianjian Laboratory of Advanced Biomedical Sciences Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
Yu‐Bing Si
Tianjian Laboratory of Advanced Biomedical Sciences Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
Wei‐Miao He
Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
Ruo‐Yu Fang
Tianjian Laboratory of Advanced Biomedical Sciences Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
Jia‐Wang Yuan
Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
Qiu‐Chen Peng
Tianjian Laboratory of Advanced Biomedical Sciences Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
Zhao‐Yang Wang
Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials (Zhengzhou University) Ministry of Education College of Chemistry Zhengzhou University Zhengzhou P. R. China
Kai Li
Shuang‐Quan Zang
Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials (Zhengzhou University) Ministry of Education Pingyuan Laboratory Zhengzhou University Zhengzhou China