[The fluorescent properites of the complexes of 1,3-diphenyl-4-acyl-5-pyrazolones with Eu(III)].
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 substituents 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.
Li
J
J
Department of Chemical Engineering, Beijing Technology and Commerce University, 100037 Beijing.
Zeng
H
H
Yu
Q
Q
Liu
G
G