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Citation: LI Jian-Yu, XUE Wei-Xing, ZHANG Jin-Na, LIU Yu-Ping, YE Zhi-Yin. Synthesis and Fluorescence Properties of the Complexes of 4-Acyl-bis(1,3-diphenyl-5-pyrazolone) with Tb(Ⅲ)[J]. Chinese Journal of Applied Chemistry, ;2002, 19(2): 158-162. shu

Synthesis and Fluorescence Properties of the Complexes of 4-Acyl-bis(1,3-diphenyl-5-pyrazolone) with Tb(Ⅲ)

1.
College of Chemical Engineering, Beijing University of Industry and Business, Beijing 100037

Corresponding author: LI Jian-Yu,
Received Date: 1 February 2001
Available Online: 10 September 2001

Three 4-acyl bis(1,3-diphenyl-5-pyrazolone) have been synthesized:1,5 bis(1'-,3'-diphenyl-5'-pyrazolone-4'-yl)-1,5-pentanedione, 1,6-bis(1'-,3'-diphenyl-5'-pyrazolone-4'-yl)-1,6-hexanedione and 1,10-bis(1'-,3'-diphenyl-5'-pyrazolone-4'-yl)-1,10-decanedione. The composition of the products were characterized by elemental analysis, FT-IR and ¹H NMR spectra. The binary and ternary complexes of Tb(Ⅲ) with the above compounds together with 1,10-phenanthroline(Phen) or 2,2-dipyridine(Dipy) have been prepared. The fluorescence properties of the complexes have been investigated. The characteristic fluorescence of Tb(Ⅲ) ion, and the energy level of the triplet state of the three 4-acyl bis(1,3-diphenyl-5-pyrazolone) ligands were found to be well matched with the lowest excited state(⁵D₄) level of the Tb(Ⅲ) ion. The fluorescence intensities of the complexes decreased with the increase of the length of carbon chains between the two pyrazolone rings of 4-acyl bis(1,3-dipheny-5-pyrazolone) ligands. The second ligand, Phen and Dipy, enhanced the fluorescence intensity of the complexes, while the Phen appeared to be better than the Dipy.
- acyl-bis(diphenyl-pyrazolone),
- Tb(Ⅲ),
- complex,
- fluorescence
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