Abstract
Three series of lanthanide complexes [LnL1, LnL2 and LnL3 Ln=Eu, Gd and Tb] have been synthesized with tripodal amide ligands. These ligands have similar benzoate antenna with different substituent groups at para-position (L1=–OME, L2=–H; L3=–CF3). The antenna effect is known to play a prominent role in the luminescence of the lanthanide ions emitting in the coordination complexes. The effect of the ligands triplet and antenna effect have been studied here. The room and low temperature photophysical properties of the nine complexes have been monitored in solution with excitation at 330nm. The emission antenna effect (quantum yield and emission intensity) varied with the triplet state of ligand that comes from the substituent on the benzoate antenna.
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