Study on photophysical properties of Eu(III) complexes with aromatic β-diketones – Role of charge transfer states in the energy migration

Lanthanide complexes based on a conjugated pyridine carboxylate ligand: structures, luminescence and magnetic properties

“…Aer the introduction of suitable organic ligands, lanthanide compounds exhibit unique photophysical properties, such as strong luminescence, high quantum yield, long luminescence life and large Stokes shis. 12,13 Experiments show that H 2 bpda ligand is an efficient sensitizer for the lanthanide ions because the energy gaps between the ligand and lanthanum ions is suitable for the effective ligand-to-metal energy transfer. Moreover, H 2 bpda ligand can be coordinate to lanthanide ions in various modes, such as unidentate coordinating, bidentate chelating and bridging coordination since the carboxyl group of the ligand can be partially or completely dehydrogenated by adjusting the pH value.…”

Influence of Lewis Bases on the Mesogenic and Luminescent Properties of Homogeneous Films of Europium(III) Tris(β‐diketonate) Adducts

“…The fluorescence lifetimes of the lanthanide complexes lie in the range 0.114–0.503 ms, which is typical for Eu III complexes with β‐diketone ligands , . However, the light transparencies and the phase behaviors of the films exert a significant impact on their luminescence intensities.…”

Cooperative loading of multisite receptors with lanthanide containers: an approach for organized luminescent metallopolymers

“…S15 and S16 † ) produce typical europium-centred red luminescence, which results from indirect sensitization according to the antenna mechanism. 34 The initial ligand-centred 1 π* ← 1 π excitation is followed by a (probable) 35 intersystem crossing process, then L1 → Eu and/or X → Eu energy transfers occur, thus leading to Eu( 5 D 1 ) and Eu( 5 D 0 )-centred emissions. 34 , 35 The europium-centred emission bands recorded for [EuX 3 dig] and [EuX 3 L1 ] are diagnostic for the existence of low-symmetry tris-β-diketonates Eu( iii ) complexes with (i) Eu( 5 D 1 → 7 F J ) emissions being far less intense than for Eu( 5 D 0 → 7 F J ) 15a , 33 and (ii) Eu( 5 D 0 → 7 F J ) emissions being dominated by the 2 J + 1 = 5 split components of the hypersensitive forced electric dipolar 5 D 0 → 7 F 2 transition monitored around 16 320 cm –1 ( Fig.…”