ABSTRACT
The accurate detection of UV radiation are required in a wide range of chemical industries, environmental and biologicalrelated applications. Conventional methods taking advantage of semiconductor photodetectors surfer from several drawbackssuch as sophisticated synthesis and manufacturing procedure, not being able to measure the accumulated UV dosage as wellas high defect density in the material. Searching for new strategies or materials serving as precise UV dosage sensor with extremelylow detection limit is still highly desirable. In this work, a radiation resistant uranium-organic framework [UO2(L)(DMF)] (L = 5-Nitroisophthalic acid, DMF = N,N-Dimethylformamide, denoted as compound 1) was successfully synthesized through mild solvothermalmethod and investigated as a unique UV probe with the detection limit of 2.4 × 10-7 J. Based on the UV dosage dependentluminescence spectra, EPR ****ysis, single crystal structure investigation and the DFT calculation, the UV-induced radicalquenching mechani** was confirmed. Importantly, the generated radicals are of significant stability which offers the opportunityfor measuring the accumulated UV radiation dosage. Furthermore, the powder material of compound 1 was further upgraded intomembrane material without loss in luminescence intensity to investigate the real application potentials. To the best of ourknowledge, compound 1 represents the most sensitive coordination polymer based UV dosage probe reported up to date.