【摘 要】
：
Ternary materials of europium complex with 2,2,6,6-tetramethyl-3,5-heptanedione(tmhd)ligand and aqua ligand as ancillary ligands have been prepared and characterized for various optoelectronic characteristics.Reactions of hydrated complex[Eu(tmhd)3(H2O)2]
【机 构】
：
Department of Chemistry,Maharshi Dayanand University,Rohtak 124001,India;Centre de Fisica,Universida
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Ternary materials of europium complex with 2,2,6,6-tetramethyl-3,5-heptanedione(tmhd)ligand and aqua ligand as ancillary ligands have been prepared and characterized for various optoelectronic characteristics.Reactions of hydrated complex[Eu(tmhd)3(H2O)2]pro-ceeded with triphenylphosphine oxide(TPPO)and pyr-idine-N-oxide(PNO)ancillary ligands were studied to develop novel complexes.The prepared complexes show good thermal stability.A comparative investigation of prepared materials[Eu(tmhd)3(H2O)2],[Eu(tmhd)3(TPPO)2]and[Eu(tmhd)3(PNO)2]was con-ducted for their luminescent behaviors in order to obtain the role of ancillary ligand in the enhancement of illumi-nation amount generated from europium(Eu3+)ion.Color coordinates of prepared ternary complexes such as[Eu(tmhd)3(H2O)2]with(x=0.54,y=0.32),[Eu(tmhd)3(TPPO)2]with(x=0.56,y=0.32)and[Eu(tmhd)3(PNO)2]with(x=0.57,y=0.33)indicated that these materials exhibited bright red emission in visible region spectrum.The complexes show a proficient energy transport pathway from the ligands to the innermost Eu3+by means of an ancillary ligand-sensitized luminescence process.Interaction between the metal and ligand results in a distinguished effect on quantum efficiency(η)as well as on Judd-Ofelt intensity factor(Ω2)of the prepared materials.
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