Radiochromic semiconductive MOFs with high sensitivity and fast photochromic responses for dual-mode X-ray direct detection

Yu, Xu-Ying; Mi, Jia-Rong; Qin, Qiu-Pei; Fang, Xin-Ping; Han, Yong-Fang; Cai, Li-Zhen; Wang, Ming-Sheng; Guo, Guo-Cong

doi:10.1039/d4qi00771a

Inorg. Chem. Front.

2024

DOI: 10.1039/d4qi00771a

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Radiochromic semiconductive MOFs with high sensitivity and fast photochromic responses for dual-mode X-ray direct detection

Xu-Ying Yu,

Jia-Rong Mi,

Qiu-Pei Qin

et al.

Abstract: X-ray direct detectors, which may directly convert X-rays into electrical signals through semiconductors, are highly desirable for early cancer screening and other applications. Prevailing commercial amorphous Se detectors still suffer...

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Cited by 5 publications

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Multiple Electron Transfer in Semiconductive Ternary D‐D'‐A Metal‐Organic Framework for Enhanced X‐Ray Detection and Imaging

Wei,

Liu,

et al. 2024

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Semiconductive metal–organic frameworks (MOFs) with donor–acceptor (D–A) characteristics have garnered attractive attention due to their capacity for separating and transferring photogenerated charges, making them promising candidates for high‐performance X‐ray detectors. However, the low charge transfer efficiency between the metal nodes and organic ligands limits the X‐ray‐to‐electricity conversion efficiency of these materials. Herein, an additional photoactive donor (D’) is introduced by incorporating a heavy atom‐containing polyoxometalate (POM) [α‐SiW12O40]4− into a binary {[Ni·bcbp·(H2O)2]·(H2O)4·Cl}n (Ni‐bcbp, bcbp: H2bcbp·2Cl = 1,1′‐bis(4‐carboxyphenyl)(4,4′‐bipyridinium) dichloride) MOF, resulting in a semiconductive ternary D‐D'‐A framework {[Ni2(bcbp)2·(H2O)4·(DMA)]·(SiW12O40)}n (SiW@Ni‐bcbp, DMA: dimethylacetamide). The obtained material features an unprecedented porous 8‐connected bcu‐net structure that accommodates nanoscale [α‐SiW12O40]4− counterions, displaying uncommon optoelectronic responses. In contrast to binary Ni‐bcbp, the SiW@Ni‐bcbp framework exhibits distinctive photochromism and robust X‐ray responsiveness, which can be attributed to the synergistic effects of the electron reservoir and multiple photoinduced electron transfer originating from the POMs. As a result, the X‐ray detector based on SiW@Ni‐bcbp demonstrates a sensitivity of 5741.6 µC Gyair−1 cm−2 with a low detection limit of 0.49 µGyair s−1. Moreover, the devices demonstrated the capability of producing clearness X‐ray images, providing a feasible and stable solution for constructing high‐performance direct X‐ray detectors.

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Multiple Electron Transfer in Semiconductive Ternary D‐D'‐A Metal‐Organic Framework for Enhanced X‐Ray Detection and Imaging

Wei,

Liu,

et al. 2024

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Metal–organic frameworks as optically stimulated luminescence dosimeter

Joshi,

Panda,

Annalakshmi

et al. 2024

J Radioanal Nucl Chem

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Metal–organic frameworks (MOF) have been vigorously investigated as hybrid materials in recent decades due to their exceptional structural versatility and applications in diverse fields. The development of novel MOFs for radiation detection and luminescence-based dosimetry is the latest topic of interest. In this contribution, we have synthesized and characterized a Uranyl MOF, which shows an optically stimulated luminescence (OSL) phenomenon induced by ionizing radiation. OSL dosimetric studies were carried out on Uranyl MOF, which revealed that MOF has a linear dose–response up to 100 Gy with a 1.1 Gy minimum detection dose. It also shows good reusability, around 30% fading in one day, very low fading beyond one day to 30 days, and decent radiation stability (stable up to 10 kGy). Preliminary dosimetry results are promising and show that Uranyl MOF can be utilized in the field of low-dose radiation processing applications in the future.

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Ba-Sr fluoride borates as inorganic radiochromic materials

Rashchenko,

Bekker,

Davydov

et al. 2025

Radiation Measurements

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Radiochromic semiconductive MOFs with high sensitivity and fast photochromic responses for dual-mode X-ray direct detection

Abstract: X-ray direct detectors, which may directly convert X-rays into electrical signals through semiconductors, are highly desirable for early cancer screening and other applications. Prevailing commercial amorphous Se detectors still suffer...

Cited by 5 publications

References 44 publications

Multiple Electron Transfer in Semiconductive Ternary D‐D'‐A Metal‐Organic Framework for Enhanced X‐Ray Detection and Imaging

Multiple Electron Transfer in Semiconductive Ternary D‐D'‐A Metal‐Organic Framework for Enhanced X‐Ray Detection and Imaging

Metal–organic frameworks as optically stimulated luminescence dosimeter

Ba-Sr fluoride borates as inorganic radiochromic materials

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