Ligand-to-ligand charge transfer state in lanthanide complexes containing π-bonded antenna ligands
Daniil A. Bardonov, Lada N. Puntus, Ilya V. Taidakov, Evgenia A. Varaksina, Konstantin А. Lyssenko, Ilya E. Nifant’ev, Dmitrii M. Roitershtein
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: [Cp Ph 3 LnCl 2 (bipy)(THF)] (Cp Ph 3 = 1,2,4-triphenylcyclopenta- dienyl, bipy = 2,2′-bipyridine) and [Cp Ph 4 LnCl 2 (bipy)(THF)] (Cp Ph 4 = 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.
Topics & Concepts
ChemistryLanthanideLigand (biochemistry)Cyclopentadienyl complexCrystallographyLuminescenceBipyridineAntenna effectCharge (physics)Crystal structurePhotochemistryIonOrganic chemistryCatalysisReceptorQuantum mechanicsPhysicsBiochemistryOptoelectronicsLanthanide and Transition Metal ComplexesMagnetism in coordination complexesOrganometallic Complex Synthesis and Catalysis