Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Preparation and Luminescent Properties of a Novel Carbazole Functionalized Bis-β-diketone Ligand and Corresponding Eu(III) and Tb(III) Complexes

  • Zhang, Wei (School of Chemistry and Chemical Engineering, Central South University) ;
  • Liu, Chang-Hui (Department of Chemistry and Environmental Engineering, Hunan City University) ;
  • Tang, Rui-Ren (School of Chemistry and Chemical Engineering, Central South University) ;
  • Tang, Chang-Quan (School of Chemistry and Chemical Engineering, Central South University)
  • Published : 2009.10.20
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Abstract

A novel carbazole functionalized bis-$\beta$-diketone type organic ligand, 1,1′-(2,6-bispyridyl)bis-3-(9-ethylcarbazole- 3-yl)-1,3-propanedione ($H_2L$) and its corresponding lanthanide complexes $Eu_2(L)_3\;and\;Tb_2(L)_3$ were successfully prepared. The ligand and complexes were characterized in detail based on FT-IR spectra, $^1H$ NMR and elemental analysis. The observed UV-Vis absorption and photoluminescence properties of the complexes were investigated, it shows that the Eu(III) and Tb(III) ions can be sensitized efficiently by the ligand ($H_2L$) to some extent, in particular, the complex $Tb_2(L)_3$ exhibits a more excellent luminescence property than the Eu(III) complex. Meanwhile, the introduction of the carbazole moiety can enlarge the $\Pi$-conjugated system of the ligand and enhance the luminescent intensity of the complexes. The results show that the complexes would be used as excellent luminescent materials.

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