Citation: Haoming Qin, Tianping Wang, Qian Yang, Deli Wu, Yumin Wang, Nannan Shen, Yanlong Wang, Zhifang Chai, Hanzhou Liu, Xing Dai, Shuao Wang. Tuning band structures in metal-organic frameworks via ligand engineering strategy enables high-performance radio-photoluminescence dosimeters[J]. Chinese Chemical Letters, ;2026, 37(12): 112769. doi: 10.1016/j.cclet.2026.112769 shu

Tuning band structures in metal-organic frameworks via ligand engineering strategy enables high-performance radio-photoluminescence dosimeters

State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China

hzhliu@suda.edu.cn

daixing@suda.edu.cn

shuaowang@suda.edu.cn

Received Date: 28 September 2025
Revised Date: 25 March 2026
Accepted Date: 13 April 2026
Available Online: 15 April 2026

Figures(3)

Metal-organic frameworks (MOFs) are promising candidates for radio-photoluminescence (RPL) dosimeters due to their structural tunability, radiation stability, and efficient X-ray attenuation capabilities mediated by heavy metal nodes (e.g., Pb²⁺). However, strategies for fine-tuning their band structures to enhance RPL performance remain elusive. To explore the effect of ligand engineering on the RPL properties of MOFs, we synthesized a series of Pb-based MOFs (Pb-1, Pb-2, and Pb-4) with terephthalic acid ligands functionalized by varying methyl groups. The incorporation of methyl groups modulates the band structure and introduces significant steric hindrance into the framework. This effect reduces the singlet–triplet energy gap, thereby facilitating the formation of RPL centers. Additionally, it enhances the stability of X-ray-induced radicals by suppressing non-radiative recombination and quenching processes. Compared to Pb-1, the detection threshold of Pb-2 and Pb-4 is improved by an order of magnitude, the response rate is increased by 4.51–4.77 times, and the decay process is prolonged by 1.58–3.49 times. This work provides a promising approach for designing high-performance MOFs-based RPL dosimeters through a simple yet effective ligand engineering strategy.
- Radio-photoluminescence,
- Metal-organic frameworks,
- Band structure,
- Steric hindrance effect,
- Dosimeter,
- Color-tunable,
- Methyl groups engineering
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