A novel coordination network of Tb(III) with 2-hydroxy-trimesic acid showing very intense photoluminescence

• Synthesis is reported of the novel luminescent coordination network [Tb(HL)(H2O)2]n.
• The compound was characterized by IR, elemental analysis, TGA and X-ray single crystallography.
• [Tb(HL)(H2O)2]n shows intense luminescence upon 380 nm excitation with a quantum yield of 67%.

A novel coordination network consisting of Tb(III) ions and 2-hydroxy-trimesic acid (H4L) has been prepared and characterized using infrared spectroscopy, elemental analysis, thermogravimetric analysis and single crystal X-ray crystallography. The structure forms a rigid three-dimensional network, which is described by the formula [Tb(HL)(H2O)2]n. The compound shows emission lines characteristic for Tb(III) when excited with near-UV radiation. The quantum yield of this process is 67%, showing that the ligand acts as a highly efficient antenna for sensitizing Tb(III) emission and that the complex TbHL potentially is a good phosphor for WLED.

A novel coordination network consisting of Tb(III) ions and 2-hydroxytrimesic acid (H4L) reveals a rigid three-dimensional network described by the formula [Tb(HL)(H2O)2]n. Bright green luminescence with a quantum yield of 67% is observed when the compound is excited with near-UV radiation, showing that the ligand acts as a highly efficient antenna for sensitizing Tb(III) emission.Figure optionsDownload as PowerPoint slide