A theoretical interpretation of the abnormal 5D0→7F4 intensity based on the Eu3+ local coordination in the Na9[EuW10O36]·14H2O polyoxometalate

Photoluminescence of Eu3+-doped nanosized microporous titanosilicate—A structural analogue of the mineral pharmacosiderite

“…3, curve c) becomes more evident. The increase of the relative intensity of the 5 D 0 → 7 F 4 transition was recently related with the distortion of the Eu 3+ local symmetry group towards a pure inversion centre environment [12]. A similar effect was also observed in silicate materials with hexagonal structure [10,13].…”

Intense red emitting monoclinic LaPO4:Eu3+ nanoparticles: host–dopant energy transfer dynamics and photoluminescence properties

“…It is reported that the U 2 parameter is related to the symmetry and the U 4 parameter to long-range effects and electronic density surrounding the rare earth ion. [50][51][52] It was observed that at all concentrations of Eu 3+ the U 4 value is greater than U 2 indicating the existence of a symmetric environment around europium ions in LaPO 4 which is highly probable because it occupies La 3+ sites (no charge imbalance).…”

Fabrication of lanthanide decatungstate [LnIII/IV(W5O18)2]8−/9− (Ln=CeIV/III, EuIII, and ErIII) thin films using spin-coating from aqueous solutions

“…7(b)) have also been observed in LB and LbL films [7,[16][17][18] and in aqueous solutions [14,20]. In summary, the Eu III W 10 film fabricated by spin-coating retains the molecular environment present in the crystal.…”