Author/Authors :
Pietraszkiewicz، نويسنده , , Oksana and Mal، نويسنده , , Suraj and Pietraszkiewicz، نويسنده , , Marek and Maciejczyk، نويسنده , , Micha? and Czerski، نويسنده , , Igor and Borowiak، نويسنده , , Teresa and Dutkiewicz، نويسنده , , Grzegorz and Drobchak، نويسنده , , Oksana and Penninck، نويسنده , , Lieven and Beeckman، نويسنده , , Jeroen and Neyts، نويسنده , , Kristiaan، نويسنده ,
Abstract :
The new triphenylene 1,3-diketone (1-triphenylen-2-yl-3-trifluoroacetylacetone (TphTA)) and its europium complexes were synthesized. The preliminary data on photophysical properties of Eu(TphTA)3(H2O)(C2H5OH) (1), Eu(TphTA)3(TOPO)(H2O) (2), Eu(TphTA)3(TOPO)2 (3) and Eu(TphTA)2NO3(TOPO)2 (4) are reported. Addition of a tri-n-octylphosphine oxide (TOPO) co-ligand to the europium diketonate complex removes water molecules from the coordination sphere, that leads to a significant increase of the photoluminescence quantum yield. The behavior of complexes 3 and 4 in nematic liquid crystal was investigated.
Keywords :
1 , Triphenylene , Liquid crystals , Luminescence , europium complexes , 3-Diketonate , quantum yield
