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 Mg(2+) 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.