A copper-based metal-organic framework for ratiometric detection of hydrogen sulfide with high sensitivity and fast response.

Metal-organic framework (MOF) is a class of crystalline porous solid materials which could be designed as sensors for bioactive molecules. In this study, charge transition between the ligand and the metal ions related emission and the ligand-based emission were formed simultaneously within a novel luminescent MOF with the copper reactive site as nodes. It can serve as a rare example of MOFs implicated ratiometric sensor for selective luminescent detection of H2S. The luminescent detection limitations for H2S is 0.21 μM, and it possesses a fast response of 30 s. The sensing mechanism is also discussed.