1,3-二苯基-4-酰基-5-吡唑酮Eu(Ⅲ)配合物的荧光性质

The Fluorescent Properites of the Complexes of 1,3-Diphenyl-4-acyl-5-pyrazolones with Eu(Ⅲ)

以四种 1,3 二苯基 4 酰基 5 吡唑酮 (酰基分别为苯甲酰基、苯乙酰基、丁酰基和氯乙酰基 ,化合物以DPBZP、DPPAP、DPBTP和DPCAP表示 )为配体 ,合成了Eu(Ⅲ )的二元和三元配合物。通过化学分析和元素分析确定了配合物的组成 ,通过FTIR谱对配合物进行了表征。测定了配合物的荧光光谱 ,结果表明 :配合物发射Eu(Ⅲ )的特征荧光 ;配合物荧光强度与配体吡唑环 4 位酰基上的取代基团密切相关 ,荧光强度随配体不同的变化顺序为DPBZP >DPPAP >DPBTP >DPCAP ;第二配体邻菲罗啉具有较为明显的荧光增强作用。

The binary and ternary Eu(Ⅲ) complexes have been prepared with four 1,3-diphenyl-4-acyl-5-pyazolones as ligands (where the four acyls are benzoyl,phenylacetyl,butyryl and choroacetyl,and the compounds are represented by DPBZP,DPPAP,DPBTP,DPCAP respectively).The composition of the complexes was determined by chemical and elementary analysis,and the structure of the complexes was characterized by FTIR spectra.The fluorescence spectra of the complexes were measured.It is indicated that the complexes emit with the characteristic fluorescence of Eu(Ⅲ),the fluorescence intensity of the complexes are closely related to the substitutents at the acyl at 4-position in pyrazolone ring of the ligands,depending on the ligands,the descending order of the fluorescence intensity is DPBZP>DPPAP>DPBTP>DPCAP,and that the second ligand,1,10-phenanthroline,remarkably intensifies the fluorescence of the complexes.