[Study on the transition of green, yellow fluorescence of ternary complexes of Tb-benzoic acid-1,10-phenanthroline].
In this paper, ternary solid complexes of Tb-benzioc acid-1,10-phenanthroline have been synthesized. Compared with binary complexes of Tb-benzioc acid, their properties were investigated. The results showed that the second ligand-phenanthroline enhanced the fluorescence intensities of Tb3+, and shortened its fluorescence lifetime, and it was found that the aggregative state influenced the luminescence properties of ternary complexes. When particulates dispersed to a certain degree, the probability of 5D4-->7F5 transition of Tb3+ was great, so, green fluorescence was observed for the complexes. With the aggregation of particles, the probability of 5D4-->7F5 transition of Tb3+ decreased, while the probability of D4-->7F3 transition increased. Therefore, ternary complexes of Tb-benzoic acid-1,10-phenanthroline exhibited yellow fluorescence. In addition, spectroscopic properties of the complexes were investigated.
Wang
Xi-gui
XG
Department of Chemistry, Inner Mongolia Normal University, Huhhot 010022, China.
Wu
Hong-ying
HY
Yao
Guang-qing
GQ
Weng
Shi-fu
SF
Wu
Jin-guang
JG
D001565:Benzoates / Q000737:chemistry*; D005453:Fluorescence; D008027:Light; D049449:Luminescence; D008422:Materials Testing; D044367:Phase Transition; D010618:Phenanthrolines / Q000737:chemistry*; D010777:Photochemistry / Q000379:methods; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013057:Spectrum Analysis
D001565:Benzoates; D010618:Phenanthrolines; C025205:1,10-phenanthroline