Simultaneous observation of ligand-based fluorescence and phosphorescence within a magnesium-based CP/MOF at room temperature

A highly thermally stable CP/MOF, comprised of Mg²⁺ and H₂EBTC^2- with the formula of [Mg(H₂EBTC)(DMF)₂], emits dual band luminescence centered at 376 and 555 nm. The former is assigned to the fluorescence of H₂EBTC^2- and the latter with 1.63 μs decay lifetime and large Stokes shifts corresponds to the phosphorescence of H₂EBTC^2-. To the best of our knowledge, this is the first time the ligand-based phosphorescence in a CP/MOF without any heavy atom at room temperature has been observed.