稀土配合物RE(pic)_3L的合成、荧光性质及与ct-DNA的作用方式

Synthesis,Fluorescence and Preliminary ct-DNA-binding Studies of RE(pic)_3L

合成了4种N,N-乙基,苯基-N’-苯基-1,1’-联萘-2,2’-二(氧杂乙酰胺)(L)稀土配合物.通过元素分析、红外光谱、紫外光谱、差热-热重和摩尔电导率的分析,确定配合物的组成为RE(pic)3L[RE=La(Ⅲ),Eu(Ⅲ),Tb(Ⅲ),Ce(Ⅲ)],稀土离子的配位数为10,其在CH3OH溶液中属于非电解质.该系列配合物的荧光光谱表明,Eu(Ⅲ)配合物的荧光强度远大于Tb(Ⅲ)配合物,说明配体L的三重态能级与Eu3+的激发态能级匹配较好.通过紫外光谱、荧光光谱和黏度法对配合物与ct-DNA之间的作用方式进行了初步研究,结果表明,配合物与ct-DNA之间存在着插入作用.

Four rare earth complexes of N,N-ethyl,phenyl-N -phenyl-1,1 -dinaphthyl 2,2 -bis(oxaacetamide)(L) are synthesized and also characterized by elemental analysis,UV spectra,IR spectra,TG-DTA and the molar conductivity.The results indicate that the composition of the four complexes is RE(pic)3L[RE=La(Ⅲ),Eu(Ⅲ),Tb(Ⅲ),Ce(Ⅲ)].The coordination number of the rare earth ions is ten.The molar conductances of the complexes in methanol indicates that all complexes act as nonelectrolytes.The fluorescence spectra shows tha...