Stability of Metal-Organic Frameworks Towards Β-Ray Irradiation: Role of Organic Groups

Abstract

Metal-organic frameworks (MOFs) have emerged high potentials in recovering nuclides, while their performances preferentially depend on the stability under ray irradiation including β-ray. Herein, the contribution of organic groups on β-ray resistance property was studied via using UiO-66 and MIL-101 as the platforms. All the group-absence and single-group MOFs exhibit poor stability under high dosage of β-ray. The groups of -NH2 and -COOH have slightly negative effects while the -SO3H, -NO2 and -OH will largely weaken the stability. Interestingly, dual-group MOFs including UiO-66-(OH)2 and UiO-66-(COOH)2 show excellent β-ray resistance up to the irradiation dosage of 2 MGy. Compared with single group, the high-density organic groups surrounding the clusters can act an effective protection parclose, which may prevent the attack from β-ray electron stream. We anticipate that this work will provide a guideline for rationally designing materials with strong β-ray resistance.

Keywords: β-ray irradiation, Metal-organic framework, stability, organic group, protection parclose