论文部分内容阅读
A novel ligand, N,N’-(2,6-pyridinedicarbonyl)bis[N-(carboxymethyl)] (L1) was designed and synthesized starting from pyri-dine-2,6-dicarboxylic acid (1). The ligand (L1) and intermediate product (3) were characterized by 1H nuclear magnetic resonance (NMR), Fourier transform infrared spectrometer (FT-IR) spectra and elemental analysis. Besides, four novel co-luminescence systems of Sm-La-pyridyl carboxylic acids: K4Sm(1-x)Lax(L1)Cl3·y1H2O, K12Sm2(1-x)La2x(L2)3 Cl6·y2H2O, K6Sm2(1-x)La2x(L3)Cl6·y3H2O and K4Sm(1-x)Lax(L4)Cl3·y4H2O (x was the mole fraction of La(III) in the mixed ions, the value was 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, respectively; y1, y2, y3, y4 were plus integer) were studied, and the mechanism of fluorescence enhancement effect was discussed detailedly.
A novel ligand, N, N ’- (2,6-pyridinedicarbonyl) bis [N- (carboxymethyl)] (L1) was designed and synthesized from pyri-dine- Fourier transform infrared spectrometer (FT-IR) spectra and elemental analysis. Further, four novel co-luminescence systems of Sm-La-pyridyl carboxylic acids: K4Sm (1-x) Lax (L1) Cl3 · y1H2O, K12Sm2 (1-x) La2x (L2) 3 Cl6 · y2H2O, K6Sm2 (1-x) La2x (L3) Cl6 · y3H2O and K4Sm (1-x) Lax (L4) Cl3 · y4H2O (x was the mole fraction of La (III) in the mixed ions, the value was 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, , y2, y3, y4 were plus integer) were studied, and the mechanism of fluorescence enhancement effect was detailed.