Electronic transitions of aryl phosphines

Luminescent properties of yttrium diphenylphosphinate activated by europium

“…ble and kinetically inert complexes [4]. Additionally, it exhibits a large absorption band in the UV region due to the aromaticity of the phenyl groups [5].…”

Thermostable Eu(III)-nanorod luminophores with effective photosensitized energy transfer

“…The transition bands of [Eu(hfa) x (DPP) y ] n and [Eu(hfa) x (TPPO) y (DPP) z ] n are observed at 273, 300 and 330 nm. The transition bands at 273 nm is assigned to the transition band of DPP molecules [15]. We consider that transition bands at around 300 nm of [Eu(hfa) x (DPP) y ] n and [Eu(hfa) x (TPPO) y (DPP) z ] n are contributed to the pep* transition bands of hfa ligands.…”

A new xantphos-type ligand and its gold(I) complexes: Synthesis, structure, luminescence

“…The broad band around 330 nm is characteristic of aromatic phosphines. Fife et al [38] assigned it to an n o S* transition (the excitation of an electron from the lone-pair orbital of the P atom to a S* orbital of phenyl rings). It is more intense than most other (e. g. carbonyl) n o S* bands, which can be due partly to the coupling of this electronic transition with vibrational ones, partly to the fact that it has some S o S* character.…”