Ratiometric fluorescence detection of trace water in an organic solvent based on bimetallic lanthanide metal-organic frameworks

Here we report a new sensor Tb 97.11 Eu 2.89 -L1 that enables ratiometric detection of trace water in CH 3 CN. As the water content increases from 0% to 2.5% (v/v%), Tb 97.11 Eu 2.89 -L1 exhibits an excellent linear relationship between the water content and I 543 / I 615 , as well as variable emissive light colors visible to the naked eye. A highly sensitive sensor Tb 97.11 Eu 2.89 -L1 , which is an excellent water-sensing material for detecting trace water in an organic solvent, is reported.