Judd-Ofelt analysis of warm reddish orange light emanating samarium (III) complexes possessing two band gaps

Augmentation of photophysical features and Judd–Ofelt analysis of extensively green glowing terbium (III) complexes with nitrogen donor ancillary ligands

“…The deprotonation occurred in the carboxylic group because the carboxylic hydrogen is more acidic than the amino hydrogen [21]. The difference between asymmetric and symmetric vibrations of the carboxylato group (∆ = v asym (COO)-v sym (COO)) was helpful to observe the chelation mode of the carboxylato group [22,23]. If ∆ > 200 then the carboxylato group was coordinated in a monodentate manner, herein all synthesized complexes exhibited ∆ > 200 cm -1 (Table 2), which suggests the presence of the mono-coordinated carboxylic group.…”

Computational analysis, Urbach energy and Judd–Ofelt parameter of warm Sm3+complexes having applications in photovoltaic and display devices

“…[18][19][20] However, the 4f-4f transition of lanthanide(III) ions is Laporte forbidden, which results in a low emission intensity. 21,22 To overpower lesser intensity and for the effective transfer of energy, organic ligands with a high absorption coefficient, a bidentate donor site and an extensive p conjugation system are required for chelation with lanthanide(III) ions. The impact of chelation of ligands on the optical characteristics of lanthanide(III) ions is known as the "antenna effect".…”