Quinolinonebased rare earth complexes were synthesized from carboxylic acid derivatives of quinolinone (1). Their structures were characterized by FTIR

TG

MS analyses

and the complexes were determined to be ［Ln(C

16

H

15

N

3

O

6

)X］·nH

2

O (Ln=Ce

Tb). The fluorescence properties of complexes and compound 1 were investigated. The result showed that the fluorescence intensity of cerium complex (2)〗 was 3.0 times as the compound 1. Meanwhile，the maximum fluorescence emission wavelength of complex 2 exhibited red shift (46 nm) compared to that of compound 1. The maximum fluorescence emission wavelength of terbium complex (3) exhibited red shift (46 nm) compared to that of compound 1. The peak pattern of the two lanthanide metal complexes was superior compared to that of compound 1 and metal ions. On the base of these results

the complexes have a good application prospect in optoelectronic field

and are significant to the technological development in biological detection and fluorescence imaging.