Optics and Spectroscopy
To authors
4f^n-4fn-1d-transitions in the optical spectra of tris (1,2,4-triphenylcyclopentadienyl) complexes of the lanthanide ions
Puntus L. N.
1, Varaksina E. A.2, Lyssenko K.A.
3,4, Roitershtein D.M.5,6
1Fryazino Branch, Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Fryazino, Moscow oblast, Russia
2Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia
3Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
4Plekhanov Russian University of Economic, Moscow, Russia
5National Research University Higher School of Economics, Moscow, Russia
6Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russia
2Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia
3Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
4Plekhanov Russian University of Economic, Moscow, Russia
5National Research University Higher School of Economics, Moscow, Russia
6Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russia
Email: ladapuntus@gmail.com, janiy92@yandex.ru, klyssenko@gmail.com, roiter@yandex.ru
Tris complexes of Ln3+ ions (Ln = La, Ce, Pr), with triphenyl-substituted cyclopentadienyl ligands were studied by optical spectroscopy. Emission of both 5d-4f and 4f-4f transitions was observed for Pr3+ complex. It was found that the strength of the crystal field formed by triphenyl-substituted cyclopentadienyl ligands in tris complexes is comparable to the case of sulfides, and as a result, red luminescence is observed for the Ce3+ compound. The quantum yield of photoluminescence is 20% for the latter. Keywords: 5d-4f-luminescence, ligand field, quantum yield of photoluminescence, Ln3+ ions, cyclopentadienyl ligand.
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