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Three new complexes TbL_3dipy(H_2O)_2, TbL_3phen(H_2O)_2 and TbL_2(TPPO)_2NO_3 have been synthesized (L=phenylglyoxylate ion, dipy=2,2-dipyridine, phen=1,10-phenanthroline, TPPO=Triphenyl phosphine oxide). Elemental analysis, conductivity, IR spectra and ~1HNMR spectra studies were performed on them. IR spectra indicate that carboxylate ions in the phenylglyoxylate are coordinated to Tb(Ⅲ) ions as unidentate ligands. In ~1HNMR, the signals of hydrogens in phenylglyoxylate shift upfield. The excitation and emission spectra of the three complexes were recorded at room temperature, the excitation spectra show that the optimum excitation wavelengths are 361.0, 359.0 and 367.0 nm, respectively. Four emission bands due to ~5D_4-~7F_j(j=6, 5, 4, 3)transitions were observed for TbL_3dipy(H_2O)_2 (489.0, 545.0, 584.0,620.0 nm) and TbL_3phen(H_2O)_2 (490.0, 544.0, 583.0, 620.0 nm). And under the same conditions, only one emission band due to ~5D_4-~7F_5 transition was observed for TbL_2(TPPO)_2NO_3. The emission intensity of TbL_3dipy(H_2O)_2 is the strongest among the three complexes.
Three new complexes TbL_3dipy (H_2O) _2, TbL_3phen (H_2O) _2 and TbL_2 (TPPO) _2NO_3 have been synthesized (L = phenylglyoxylate ion, dipy = 2,2- dipyridine, phen = 1,10-phenanthroline, TPPO = Triphenyl phosphine oxide Elemental analysis, conductivity, IR spectra and ~ 1H NMR spectra studies were performed on them. IR spectra indicate that carboxylate ions in the phenylglyoxylate are coordinated to Tb (III) ions as unidentate ligands. In ~ 1HNMR, the signals of hydrogens in phenylglyoxylate shift upfield. The excitation and emission spectra of the three complexes were recorded at room temperature, the excitation spectra show that the optimum excitation wavelengths are 361.0, 359.0 and 367.0 nm, respectively. Four emission bands due to ~ 5D_4- ~ 7F_j (j = (490.0, 544.0, 583.0, 620.0 nm) transitions were observed for TbL_3dipy (H_2O) _2 (489.0, 545.0, 584.0,620.0 nm) and TbL_3phen (H_2O) only one emission band due to ~ 5D_4- ~ 7F_5 transition was observed for TbL_2 (TPPO) _ 2NO_3. The emission intensity of TbL_3dipy (H_2O) _2 is the strongest among the three complexes.