A Bimetallic Lanthanide Metal–Organic Material as a Self‐Calibrating Color‐Gradient Luminescent Sensor

A new bimetallic lanthanide metal-organic framework [Eu0.5 Tb1.5 (FDA)3 ] (H2 FDA = 2,5-furandicarboxylic acid) exhibits high-sensitivity luminescent sensing of mixtures of organic compounds and can work over a large range of volume ratios. The self-calibrating behavior of this color-gradient luminescent sensor is presented for the first time.