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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 4
BKCSDE 33(4)
April 20, 2012 

The Co-luminescence Groups of Sm-La-pyridyl Carboxylic Acids and the Binding Characteristics between the Selected Doped Complex and Bovine Serum Albumin
Zhengfa Yang, Ruiren Tang,* Chunhua Tang
Synthesis, Pyridine derivate, Lanthanide complex, Co-luminescence, Bovine serum albumin
A novel ligand N,N'-(2,6-pyridinedicarbonyl)bis[N-(carboxymethyl)] (L1) was designed and synthesized. Four co-luminescence groups of Sm-La-pyridyl carboxylic acids systems were researched, which are K4Sm(1-x)- Lax(L1)Cl3·y1H2O, K4Sm(1-x)Lax(L2)Cl3·y2H2O, K6Sm2(1-x)La2x(L3)Cl6·y3H2O, K4Sm(1-x)Lax(L4)Cl3·y4H2O. The results indicated the addition of La(III) could sensitize the luminescence of Sm(III) obviously in a certain range, enhancing emission intensity of Sm-pyridyl carboxylic acids relative to the undoped ones. The optimal mole percentages of La(III) in the mixed ions for L1, L2, L3, L4 were confirmed to be 0.6, 0.5, 0.3, 0.6, respectively. The mechanism of the fluorescence enhancement effect was discussed in detail. Furthermore, the binding interaction of K4Sm0.4La0.6(L4)Cl3·5H2O with bovine serum albumin (BSA) have been investigated due to its potential biological activity. The binding site number n was equal to 1.0 and binding constant Ka was about 2.5 × 105 L·mol−1.
1303 - 1309
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