Chemiluminescence activated by the Tb3+ ion in (Bui2Al)2O aluminoxane oxidation with dioxygen in toluene

Russian Chemical Bulletin -     

Luminescence Monitoring of Lanthanide Catalysts for Diene Polymerization

Changes in the luminescence characteristics of Tb³⁺ and Ce³⁺ lanthanide ions in the interaction of LnCl₃ · 3(BuO)₃PO complexes with iso-Bu₃Al in the absence and presence of piperylene were studied. As a result, a new luminescence approach was proposed to study reaction mechanisms in the synthesis of lanthanide catalysts for diene polymerization.     

Triboluminescence of lanthanide acetylacetonates

Triboluminescence of Ln(acac)₃·H₂O (Ln = Tb, Eu, Pr, Ce, Gd) was found. The UV radiation was detected for the first time as narrow bands caused by the emission of the adsorbed N₂* molecules (transitions ³∏_u → ³∏_g) in the study of triboluminescence of lanthanide compounds. The emission of Ln³⁺* (ionic triboluminescence) was observed only for Tb³⁺* (λ_max/nm: 490 (⁵D₄-⁷F₆), 545 (⁵D₄-⁷F₅), 580 (⁵D₄-⁷F₄)) and Eu³⁺* (λ?max/nm: 613, 614 (⁵D₂-⁷F₃)). The generation of N₂* occurs due to the energy of electric fields appeared upon the destruction of crystalline samples of Ln(acac)₃·H₂O. The Tb³⁺* and Eu³⁺* ions are formed due to the energy transfer from the triplet level of the ligand (acacT₁), which is excited by the light emitted from the N₂* molecule.