A Uranyl-Based Luminescent Dosimeter for Ultralow-Dose Tracking of UV and X-ray Radiation

Abstract

The characteristics of high sensitivity, visual responsiveness, and non-destructive readout render radio-induced photoluminescent materials particularly attractive for detecting ionizing radiation. However, most current fluorescence-based dosimeters suffer from issues such as radiation-induced degradation and insufficient sensitivity, making materials capable of detecting ultralow radiation doses still scarce. Herein, we report a novel uranyl-based organic–inorganic hybrid dosimeter, designated as U-OX-PIP. Remarkably, U-OX-PIP exhibits UV/X-ray-induced fluorescence quenching responses, which are characterized by a gradual suppression of the uranyl emission signature. The pronounced fluorescence quenching behavior of U-OX-PIP enable its application as a highly sensitive radiation-responsive material. Furthermore, the identification of radiation-induced C-O• radical species establishes U-OX-PIP as an ultrasensitive quenching-type dosimetric material.