Luminescence intensification of terbium(III) ion complexes with dipivaloylmethane (tmhd) and monodentate auxiliary ligands

The synthesis, structural analysis and photophysical properties of terbium with dipivaloylmethane (tmhd) and monodentate auxiliary ligands were reported. Aqua (H2O), urea (H2NCONH2), triphenylphosphine oxide ((C6H5)3PO), pyridine-N-oxide (C5H5NO) and 2-pyridinol-N-oxide (HOC5H5NO) were used as monodentate auxiliary ligands. For structural analysis, various spectroscopic techniques were used such as CHN elemental analysis, PNMR and FTIR. Both excitation and emission spectroscopy were used for probing optical characterization. For metal complexes, by examining the emission wavelength compatible with 5D4 → 7F5 transition, luminescent decay time was also deliberated. A relative investigation of photoluminescent character of synthesized complexes were made as the function of monodentate subsidiary ligands in the enrichment of luminescence intensity formed by Tb(III) ion. The value of CIE color coordinates proposed that complexes exhibited dark green luminescence in visible region. The complexes generating green light in visible region play important role in construction of proficient display and lighting devices.