Synthesis and Characterization of Bieuropium Complex Coordinating Hbbimp, and Its Hydrolytic Kinetic Research for Cleaving an Activated Phosphate Diester BDNPP

合成了Eu(Ⅲ)配合物[Eu2(bbimp)(CH3COO)(CH3CH2O)2(CH3CH2OH)](ClO4)2 (A), 产物经IR谱、UV 谱、1H NMR谱、摩尔电导、元素分析对其结构进行了基本鉴定. 用紫外光谱法研究了磷酸二酯键模型物双-(2, 4-二硝基苯基)磷酸盐BDNPP与配合物A在pH 7.26, 25和37 ℃时, [BDNPP]=[A]=2.5×10-5 mol*L-1时的动力学性质, 得到 BDNPP的二级水解速率常数为k25 ℃=3.027×103(mol*L-1)-1*min-1, k37 ℃=6.060×103(mol*L-1)-1*min-1, 半衰期t1/2分别为12.9和6.6 min,使BDNPP的水解速率大大提高.