Luminescence properties of the co-luminescence groups of Sm-La-pyridyl carboxylic acids |
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| Authors: | BAO Jiqing TANG Chunhua YANG Zhengfa TANG Ruiren |
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| Affiliation: | 1. Resources and Environment Technical Research Institute, Jiaxing University, Jiaxing 314033, China; 2. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China) Received 19 August 2011; revised 23 October 2011 |
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| Abstract: | A novel ligand, N,N’-(2,6-pyridinedicarbonyl)bisN-(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. |
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| Keywords: | pyridine derivate lanthanide complexes co-luminescence rare earths |
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