Luminescence sensitization of the Nd3+ ion in diphenyl(9-antnracenyl)cyclopentadienyl complexes containing antenna-ligand with extended π-system

Mono-3,4-diphenyl(9-anthracenyl)cyclopentadienyl dichloride complexes {[CpAntLn(thf)]2(µ2-Cl)2(µ3-Cl)3K(thf)}2 Ln = Nd, Gd, Tb, CpAnt = Ph2(C14H9)C5H2 were synthesized and structurally characterized. All the complexes were obtained in the form of tetranuclear ate complexes consisting of two [CpAntLn(thf)]2(µ2-Cl)2(µ3-Cl)3K(thf) units connected via two K–Cl bonds. In ]the Tb complex, anthracene fragments from two different molecules participate in the stacking interactions with a high degree of π-system overlap. Characteristic luminescence of the Nd3+ ion was obtained for the first time for the Nd-cyclopentadienyl complex. Energies of singlet and triplet states for CpAnt ligand were estimated.