Ligand-to-ligand charge transfer state in lanthanide complexes containing π-bonded antenna ligands |
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| Affiliation: | 1. A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russian Federation;2. National Research University Higher School of Economics, 101000 Moscow, Russian Federation;3. V. A. Kotel’nikov Institute of Radioengineering and Electronics, Russian Academy of Sciences, 141190 Fryazino, Moscow Region, Russian Federation;4. P. N. Lebedev Physical Institute, Russian Academy of Sciences, 119991 Moscow, Russian Federation;5. Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation;6. G. V. Plekhanov Russian University of Economics, 117997 Moscow, Russian Federation;7. N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation |
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| Abstract: | To design luminescent lanthanide complexes containing both π- and σ-bonded antenna ligands in the coordination sphere, we synthesized 2,2′-bipyridine complexes of Nd, Tb and Gd with tri- and tetraphenyl substituted cyclopentadienyl ligands: [CpPh3LnCl2(bipy)(THF)] (CpPh3 = 1,2,4-triphenylcyclopenta- dienyl, bipy = 2,2′-bipyridine) and [CpPh4LnCl2(bipy)(THF)] (CpPh4 = tetraphenylcyclopentadienyl). Their crystal structures were determined by X-ray diffraction analysis. Optical spectroscopic and crystallographic data indicate the presence of a ligand-to-ligand charge transfer state. |
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| Keywords: | lanthanide complexes Cp ligand NIR luminescence crystal structure charge transfer state |
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