A luminescent lanthanide metal-organic framework [Tb-7(OH)(8)(H2O)(6)(IDA)(3)(COO)(3)]center dot 4Cl center dot 2H(2)O (Tb-IDA, IDA = iminodiacetic acid) was hydro-thermally synthesized and structurally characterized. Monitoring ultraviolet radiation was achieved by correlating the dosage with the luminescence color change in doped Gd99Tb0.1Eu0.9-IDA compound. A linear relationship is developed across a broad range from blue to yellow within a CIE chromaticity diagram.